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- PDB-5xtb: Cryo-EM structure of human respiratory complex I matrix arm -

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Basic information

Entry
Database: PDB / ID: 5xtb
TitleCryo-EM structure of human respiratory complex I matrix arm
Components
  • (NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit ...) x 7
  • (NADH dehydrogenase [ubiquinone] flavoprotein ...) x 3
  • (NADH dehydrogenase [ubiquinone] iron-sulfur protein ...) x 6
  • Acyl carrier protein, mitochondrial
  • NADH-ubiquinone oxidoreductase 75 kDa subunit, mitochondrial
KeywordsOXIDOREDUCTASE/ELECTRON TRANSPORT / Respiratory / OXIDOREDUCTASE-ELECTRON TRANSPORT complex
Function / homology
Function and homology information


protein lipoylation / Complex I biogenesis / Mitochondrial Fatty Acid Beta-Oxidation / Protein lipoylation / Respiratory electron transport / protein insertion into mitochondrial inner membrane / blastocyst hatching / ubiquinone biosynthetic process / cellular respiration / cellular response to oxygen levels ...protein lipoylation / Complex I biogenesis / Mitochondrial Fatty Acid Beta-Oxidation / Protein lipoylation / Respiratory electron transport / protein insertion into mitochondrial inner membrane / blastocyst hatching / ubiquinone biosynthetic process / cellular respiration / cellular response to oxygen levels / mesenchymal stem cell proliferation / respiratory chain complex / reproductive system development / mitochondrial [2Fe-2S] assembly complex / iron-sulfur cluster assembly complex / mitochondrial large ribosomal subunit binding / gliogenesis / mesenchymal stem cell differentiation / circulatory system development / oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor / cardiac muscle tissue development / neural precursor cell proliferation / [2Fe-2S] cluster assembly / oxygen sensor activity / stem cell division / NADH dehydrogenase activity / sodium ion transport / iron-sulfur cluster assembly / acyl binding / mitochondrial ATP synthesis coupled electron transport / electron transport coupled proton transport / acyl carrier activity / NADH:ubiquinone reductase (H+-translocating) / regulation of protein phosphorylation / mitochondrial respiratory chain complex I assembly / mitochondrial electron transport, NADH to ubiquinone / proton motive force-driven mitochondrial ATP synthesis / RHOG GTPase cycle / respiratory chain complex I / positive regulation of execution phase of apoptosis / response to cAMP / NADH dehydrogenase (ubiquinone) activity / endopeptidase activator activity / quinone binding / cellular response to interferon-beta / extrinsic apoptotic signaling pathway / cellular response to retinoic acid / neurogenesis / Mitochondrial protein degradation / substantia nigra development / muscle contraction / reactive oxygen species metabolic process / aerobic respiration / synaptic membrane / fatty acid binding / regulation of mitochondrial membrane potential / respiratory electron transport chain / DNA damage response, signal transduction by p53 class mediator / kidney development / monooxygenase activity / fatty acid metabolic process / circadian rhythm / brain development / mitochondrial membrane / mitochondrial intermembrane space / 2 iron, 2 sulfur cluster binding / multicellular organism growth / NAD binding / positive regulation of protein catabolic process / fatty acid biosynthetic process / cellular senescence / FMN binding / nervous system development / 4 iron, 4 sulfur cluster binding / protease binding / gene expression / electron transfer activity / mitochondrial inner membrane / nuclear body / mitochondrial matrix / negative regulation of DNA-templated transcription / neuronal cell body / calcium ion binding / ubiquitin protein ligase binding / protein-containing complex binding / structural molecule activity / mitochondrion / RNA binding / nucleoplasm / ATP binding / metal ion binding / nucleus / cytoplasm
Similarity search - Function
Alpha-Beta Plaits - #3270 / Rossmann fold - #12280 / NADH-ubiquinone oxidoreductase 51kDa subunit / NADH-ubiquinone oxidoreductase 51kDa subunit, iron-sulphur binding domain / Ubiquitin-like (UB roll) - #600 / Cytochrome-c3 Hydrogenase; chain B / Cytochrome-c3 Hydrogenase, chain B / Complex1_LYR-like / de novo design (two linked rop proteins) / NADH-ubiquinone oxidoreductase flavoprotein 3 ...Alpha-Beta Plaits - #3270 / Rossmann fold - #12280 / NADH-ubiquinone oxidoreductase 51kDa subunit / NADH-ubiquinone oxidoreductase 51kDa subunit, iron-sulphur binding domain / Ubiquitin-like (UB roll) - #600 / Cytochrome-c3 Hydrogenase; chain B / Cytochrome-c3 Hydrogenase, chain B / Complex1_LYR-like / de novo design (two linked rop proteins) / NADH-ubiquinone oxidoreductase flavoprotein 3 / NADH dehydrogenase [ubiquinone] flavoprotein 3, mitochondrial / NADH dehydrogenase [ubiquinone] iron-sulfur protein 6, mitochondrial / : / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 7 / NADH:ubiquinone oxidoreductase subunit B14.5a (Complex I-B14.5a) / NADH-ubiquinone oxidoreductase NDSU1/NuoG-like, 4Fe-4S domain / Zinc finger, CHCC-type / Zinc-finger domain / GRIM-19 / GRIM-19 protein / NDUFA6, LYR domain / NADH dehydrogenase ubiquinone Fe-S protein 4-like superfamily / NADH dehydrogenase ubiquinone Fe-S protein 4 / NADH dehydrogenase [ubiquinone] (complex I), alpha subcomplex, subunit 2 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 5 / NADH dehydrogenase ubiquinone Fe-S protein 4, mitochondrial / ETC complex I subunit conserved region / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 12 / NADH ubiquinone oxidoreductase subunit NDUFA12 / NADH dehydrogenase [ubiquinone] (complex I), alpha subcomplex, subunit 6 / : / SLBB domain / : / NADH-quinone oxidoreductase, chain G, C-terminal / NADH-ubiquinone oxidoreductase subunit G, C-terminal / : / NADH-quinone oxidoreductase subunit 3, ferredoxin-like domain / Respiratory-chain NADH dehydrogenase 20 Kd subunit signature. / NADH-ubiquinone oxidoreductase, 20 Kd subunit / NADH-quinone oxidoreductase, chain I / NAD(P)H-quinone oxidoreductase subunit D/H / NADH:ubiquinone oxidoreductase, 49kDa subunit, conserved site / Respiratory chain NADH dehydrogenase 49 Kd subunit signature. / NADH:ubiquinone oxidoreductase, subunit G / Respiratory-chain NADH dehydrogenase 75 Kd subunit signature 3. / NADH ubiquinone oxidoreductase, F subunit / NADH-quinone oxidoreductase, subunit D / Respiratory-chain NADH dehydrogenase, 49 Kd subunit / Respiratory-chain NADH dehydrogenase 75 Kd subunit signature 2. / NADH dehydrogenase, subunit C / NADH:ubiquinone oxidoreductase, 30kDa subunit, conserved site / Respiratory chain NADH dehydrogenase 30 Kd subunit signature. / Complex 1 protein (LYR family) / Respiratory-chain NADH dehydrogenase 75 Kd subunit signature 1. / : / NADH:ubiquinone oxidoreductase, 30kDa subunit / NADH:ubiquinone oxidoreductase, 30kDa subunit superfamily / Respiratory-chain NADH dehydrogenase, 30 Kd subunit / NADH:ubiquinone oxidoreductase, 75kDa subunit, conserved site / NADH-ubiquinone oxidoreductase-G iron-sulfur binding region / NADH-ubiquinone oxidoreductase-G iron-sulfur binding region / Respiratory-chain NADH dehydrogenase 51 Kd subunit signature 1. / Respiratory-chain NADH dehydrogenase 24 Kd subunit signature. / 2Fe-2S iron-sulfur cluster binding domain / NAD-dependent epimerase/dehydratase / NuoE domain / NAD dependent epimerase/dehydratase family / NADH:ubiquinone oxidoreductase, subunit G, iron-sulphur binding / His(Cys)3-ligated-type [4Fe-4S] domain profile. / NADH-quinone oxidoreductase subunit E-like / NADH:ubiquinone oxidoreductase, 51kDa subunit, conserved site / Respiratory-chain NADH dehydrogenase 51 Kd subunit signature 2. / NADH-quinone oxidoreductase subunit E, N-terminal / NADH-ubiquinone oxidoreductase 51kDa subunit, iron-sulphur binding domain / NADH-ubiquinone oxidoreductase 51kDa subunit, iron-sulphur binding domain superfamily / NADH-ubiquinone oxidoreductase-F iron-sulfur binding region / NADH-ubiquinone oxidoreductase-F iron-sulfur binding region / Thioredoxin-like [2Fe-2S] ferredoxin / NADH-ubiquinone oxidoreductase 51kDa subunit, FMN-binding domain / NADH-ubiquinone oxidoreductase 51kDa subunit, FMN-binding domain superfamily / Nuo51 FMN-binding domain / Molybdopterin oxidoreductase, 4Fe-4S domain / Prokaryotic molybdopterin oxidoreductases 4Fe-4S domain profile. / NADH:ubiquinone oxidoreductase-like, 20kDa subunit / NADH ubiquinone oxidoreductase, 20 Kd subunit / Molybdopterin oxidoreductase / Molybdopterin oxidoreductase / [NiFe]-hydrogenase, large subunit / Mitochondrial ribosomal protein L51 / S25 / CI-B8 domain / Ribosomal protein/NADH dehydrogenase domain / Mitochondrial ribosomal protein L51 / S25 / CI-B8 domain / Acyl carrier protein (ACP) / 4Fe-4S dicluster domain / 2Fe-2S ferredoxin-type iron-sulfur binding domain profile. / 2Fe-2S ferredoxin-type iron-sulfur binding domain / 2Fe-2S ferredoxin-like superfamily / Phosphopantetheine attachment site / 4Fe-4S ferredoxin, iron-sulphur binding, conserved site / 4Fe-4S ferredoxin-type iron-sulfur binding region signature. / Phosphopantetheine attachment site.
Similarity search - Domain/homology
Chem-8Q1 / FE2/S2 (INORGANIC) CLUSTER / FLAVIN MONONUCLEOTIDE / Chem-NDP / IRON/SULFUR CLUSTER / NADH dehydrogenase [ubiquinone] iron-sulfur protein 8, mitochondrial / Acyl carrier protein, mitochondrial / NADH dehydrogenase [ubiquinone] iron-sulfur protein 4, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 2 / NADH dehydrogenase [ubiquinone] iron-sulfur protein 7, mitochondrial ...Chem-8Q1 / FE2/S2 (INORGANIC) CLUSTER / FLAVIN MONONUCLEOTIDE / Chem-NDP / IRON/SULFUR CLUSTER / NADH dehydrogenase [ubiquinone] iron-sulfur protein 8, mitochondrial / Acyl carrier protein, mitochondrial / NADH dehydrogenase [ubiquinone] iron-sulfur protein 4, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 2 / NADH dehydrogenase [ubiquinone] iron-sulfur protein 7, mitochondrial / NADH dehydrogenase [ubiquinone] iron-sulfur protein 2, mitochondrial / NADH dehydrogenase [ubiquinone] iron-sulfur protein 6, mitochondrial / NADH dehydrogenase [ubiquinone] iron-sulfur protein 3, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 7 / NADH dehydrogenase [ubiquinone] flavoprotein 2, mitochondrial / NADH-ubiquinone oxidoreductase 75 kDa subunit, mitochondrial / NADH dehydrogenase [ubiquinone] flavoprotein 1, mitochondrial / NADH dehydrogenase [ubiquinone] flavoprotein 3, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 6 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 5 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 9, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 13 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 12
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsGu, J. / Wu, M. / Yang, M.
Funding support China, 5items
OrganizationGrant numberCountry
Ministry of Science and Technology2016YFA0501100 China
Ministry of Science and Technology2017YFA0504600 China
National Science Fund for Distinguished Young Scholars31625008 China
National Natural Science Foundation of China21532004 China
National Natural Science Foundation of China31570733 China
CitationJournal: Cell / Year: 2017
Title: Architecture of Human Mitochondrial Respiratory Megacomplex IIIIIV.
Authors: Runyu Guo / Shuai Zong / Meng Wu / Jinke Gu / Maojun Yang /
Abstract: The respiratory megacomplex represents the highest-order assembly of respiratory chain complexes, and it allows mitochondria to respond to energy-requiring conditions. To understand its architecture, ...The respiratory megacomplex represents the highest-order assembly of respiratory chain complexes, and it allows mitochondria to respond to energy-requiring conditions. To understand its architecture, we examined the human respiratory chain megacomplex-IIIIIV (MCIIIIIV) with 140 subunits and a subset of associated cofactors using cryo-electron microscopy. The MCIIIIIV forms a circular structure with the dimeric CIII located in the center, where it is surrounded by two copies each of CI and CIV. Two cytochrome c (Cyt.c) molecules are positioned to accept electrons on the surface of the c state CIII dimer. Analyses indicate that CII could insert into the gaps between CI and CIV to form a closed ring, which we termed the electron transport chain supercomplex. The structure not only reveals the precise assignment of individual subunits of human CI and CIII, but also enables future in-depth analysis of the electron transport chain as a whole.
History
DepositionJun 18, 2017Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 30, 2017Provider: repository / Type: Initial release
Revision 1.1Sep 6, 2017Group: Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.title / _citation.year
Revision 1.2Dec 6, 2017Group: Data processing / Database references / Category: citation / em_software
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_PubMed / _citation.title / _em_software.name
Revision 1.3Nov 6, 2019Group: Advisory / Data collection ...Advisory / Data collection / Derived calculations / Other
Category: cell / pdbx_struct_conn_angle ...cell / pdbx_struct_conn_angle / pdbx_unobs_or_zero_occ_atoms / pdbx_validate_close_contact / struct_conn
Item: _cell.Z_PDB
Revision 1.4Nov 20, 2019Group: Advisory / Derived calculations
Category: pdbx_struct_conn_angle / pdbx_unobs_or_zero_occ_atoms / struct_conn
Revision 1.5Apr 9, 2025Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_entry_details / struct_conn / struct_conn_type
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.conn_type_id / _struct_conn.id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn_type.id
Revision 1.6Sep 17, 2025Group: Advisory / Derived calculations
Category: pdbx_validate_close_contact / struct_conn / struct_conn_type

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Structure visualization

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Assembly

Deposited unit
A: NADH dehydrogenase [ubiquinone] flavoprotein 1, mitochondrial
B: NADH dehydrogenase [ubiquinone] iron-sulfur protein 8, mitochondrial
C: NADH dehydrogenase [ubiquinone] iron-sulfur protein 7, mitochondrial
E: NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 6
F: NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 2
G: Acyl carrier protein, mitochondrial
H: NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 5
I: NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 7
J: NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 9, mitochondrial
K: NADH dehydrogenase [ubiquinone] flavoprotein 3, mitochondrial
L: NADH dehydrogenase [ubiquinone] iron-sulfur protein 4, mitochondrial
M: NADH-ubiquinone oxidoreductase 75 kDa subunit, mitochondrial
N: NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 12
O: NADH dehydrogenase [ubiquinone] flavoprotein 2, mitochondrial
P: NADH dehydrogenase [ubiquinone] iron-sulfur protein 3, mitochondrial
Q: NADH dehydrogenase [ubiquinone] iron-sulfur protein 2, mitochondrial
T: NADH dehydrogenase [ubiquinone] iron-sulfur protein 6, mitochondrial
W: NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 13
hetero molecules


Theoretical massNumber of molelcules
Total (without water)401,62229
Polymers397,41818
Non-polymers4,20411
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area87770 Å2
ΔGint-505 kcal/mol
Surface area125730 Å2

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Components

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NADH dehydrogenase [ubiquinone] flavoprotein ... , 3 types, 3 molecules AKO

#1: Protein NADH dehydrogenase [ubiquinone] flavoprotein 1, mitochondrial / Complex I-51kD / CI-51kD / NADH dehydrogenase flavoprotein 1 / NADH-ubiquinone oxidoreductase 51 kDa subunit


Mass: 47323.938 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 27-457 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: P49821, NADH:ubiquinone reductase (H+-translocating), NADH dehydrogenase
#10: Protein/peptide NADH dehydrogenase [ubiquinone] flavoprotein 3, mitochondrial / Complex I-9kD / CI-9kD / NADH-ubiquinone oxidoreductase 9 kDa subunit / Renal carcinoma antigen NY-REN-4


Mass: 3900.312 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 74-106 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P56181
#14: Protein NADH dehydrogenase [ubiquinone] flavoprotein 2, mitochondrial / NADH-ubiquinone oxidoreductase 24 kDa subunit


Mass: 23430.881 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 36-247 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: P19404, NADH:ubiquinone reductase (H+-translocating), NADH dehydrogenase

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NADH dehydrogenase [ubiquinone] iron-sulfur protein ... , 6 types, 6 molecules BCLPQT

#2: Protein NADH dehydrogenase [ubiquinone] iron-sulfur protein 8, mitochondrial / Complex I-23kD / CI-23kD / NADH-ubiquinone oxidoreductase 23 kDa subunit / TYKY subunit


Mass: 20314.037 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: O00217, NADH:ubiquinone reductase (H+-translocating), NADH dehydrogenase
#3: Protein NADH dehydrogenase [ubiquinone] iron-sulfur protein 7, mitochondrial / Complex I-20kD / CI-20kD / NADH-ubiquinone oxidoreductase 20 kDa subunit / PSST subunit


Mass: 17887.928 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 58-213 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: O75251, NADH:ubiquinone reductase (H+-translocating), NADH dehydrogenase
#11: Protein NADH dehydrogenase [ubiquinone] iron-sulfur protein 4, mitochondrial / Complex I-18 kDa / CI-18 kDa / Complex I-AQDQ / CI-AQDQ / NADH-ubiquinone oxidoreductase 18 kDa subunit


Mass: 13721.598 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 58-175 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O43181
#15: Protein NADH dehydrogenase [ubiquinone] iron-sulfur protein 3, mitochondrial / Complex I-30kD / CI-30kD / NADH-ubiquinone oxidoreductase 30 kDa subunit


Mass: 24432.656 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 43-250 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: O75489, NADH:ubiquinone reductase (H+-translocating), NADH dehydrogenase
#16: Protein NADH dehydrogenase [ubiquinone] iron-sulfur protein 2, mitochondrial / Complex I-49kD / CI-49kD / NADH-ubiquinone oxidoreductase 49 kDa subunit


Mass: 43987.625 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 79-463 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: O75306, NADH:ubiquinone reductase (H+-translocating), NADH dehydrogenase
#17: Protein NADH dehydrogenase [ubiquinone] iron-sulfur protein 6, mitochondrial / Complex I-13kD-A / CI-13kD-A / NADH-ubiquinone oxidoreductase 13 kDa-A subunit


Mass: 10578.848 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O75380

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NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit ... , 7 types, 7 molecules EFHIJNW

#4: Protein NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 6 / Complex I-B14 / CI-B14 / LYR motif-containing protein 6 / NADH-ubiquinone oxidoreductase B14 subunit


Mass: 13758.070 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 42-154 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P56556
#5: Protein NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 2 / Complex I-B8 / CI-B8 / NADH-ubiquinone oxidoreductase B8 subunit


Mass: 9535.905 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 14-96 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O43678
#7: Protein NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 5 / Complex I subunit B13 / Complex I-13kD-B / CI-13kD-B / NADH-ubiquinone oxidoreductase 13 kDa-B subunit


Mass: 13119.208 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q16718
#8: Protein NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 7 / Complex I-B14.5a / CI-B14.5a / NADH-ubiquinone oxidoreductase subunit B14.5a


Mass: 12282.051 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 4-113 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O95182
#9: Protein NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 9, mitochondrial / Complex I-39kD / CI-39kD / NADH-ubiquinone oxidoreductase 39 kDa subunit


Mass: 38387.594 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 40-375 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q16795
#13: Protein NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 12 / 13 kDa differentiation-associated protein / Complex I-B17.2 / CIB17.2 / NADH-ubiquinone ...13 kDa differentiation-associated protein / Complex I-B17.2 / CIB17.2 / NADH-ubiquinone oxidoreductase subunit B17.2


Mass: 16880.068 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9UI09
#18: Protein/peptide NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 13 / Cell death regulatory protein GRIM-19 / Complex I-B16.6 / CI-B16.6 / Gene associated with retinoic ...Cell death regulatory protein GRIM-19 / Complex I-B16.6 / CI-B16.6 / Gene associated with retinoic and interferon-induced mortality 19 protein / Gene associated with retinoic and IFN-induced mortality 19 protein / NADH-ubiquinone oxidoreductase B16.6 subunit


Mass: 2560.952 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 7-28 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9P0J0

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Protein , 2 types, 2 molecules GM

#6: Protein Acyl carrier protein, mitochondrial / ACP / CI-SDAP / NADH-ubiquinone oxidoreductase 9.6 kDa subunit


Mass: 9845.247 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O14561
#12: Protein NADH-ubiquinone oxidoreductase 75 kDa subunit, mitochondrial / Complex I-75kD / CI-75kD


Mass: 75471.484 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 30-716 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: P28331, NADH:ubiquinone reductase (H+-translocating), NADH dehydrogenase

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Non-polymers , 5 types, 11 molecules

#19: Chemical
ChemComp-SF4 / IRON/SULFUR CLUSTER


Mass: 351.640 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: Fe4S4
#20: Chemical ChemComp-FMN / FLAVIN MONONUCLEOTIDE / RIBOFLAVIN MONOPHOSPHATE


Mass: 456.344 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C17H21N4O9P
#21: Chemical ChemComp-8Q1 / S-[2-({N-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-beta-alanyl}amino)ethyl] dodecanethioate / S-dodecanoyl-4'-phosphopantetheine


Mass: 540.651 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C23H45N2O8PS
#22: Chemical ChemComp-NDP / NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE


Mass: 745.421 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C21H30N7O17P3
#23: Chemical ChemComp-FES / FE2/S2 (INORGANIC) CLUSTER


Mass: 175.820 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Fe2S2

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Details

Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Human respiratory complex I matrix arm / Type: COMPLEX / Entity ID: #1-#18 / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
SpecimenConc.: 0.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 1.25 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k)

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Processing

EM software
IDNameVersionCategory
1EMAN2.1particle selection
2AutoEMation2image acquisition
4CTFFIND3CTF correction
7Coot0.8.2model fitting
9RELION1.4initial Euler assignment
10RELION1.4final Euler assignment
11RELION1.4classification
12RELION1.43D reconstruction
13PHENIX1.11.1model refinement
CTF correctionType: NONE
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 167761 / Symmetry type: POINT

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