[English] 日本語
Yorodumi
- PDB-6jd1: Cryo-EM Structure of Sulfolobus solfataricus ketol-acid reductois... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 6jd1
TitleCryo-EM Structure of Sulfolobus solfataricus ketol-acid reductoisomerase (Sso-KARI) in complex with Mg2+, NADH, and CPD at pH7.5
ComponentsPutative ketol-acid reductoisomerase 2
KeywordsISOMERASE / Bi-specific / Thermostable / Reductoisomerase / Magnesium-dependent / Dodecamer / Knotted protein
Function / homology
Function and homology information


ketol-acid reductoisomerase (NADP+) / ketol-acid reductoisomerase activity / L-valine biosynthetic process / isoleucine biosynthetic process
Similarity search - Function
Ketol-acid reductoisomerase, C-terminal / Ketol-acid reductoisomerase / Ketol-acid reductoisomerase, N-terminal / Ketol-acid reductoisomerase, C-terminal domain / Acetohydroxy acid isomeroreductase, NADPH-binding domain / KARI N-terminal domain profile. / KARI C-terminal domain profile. / 6-phosphogluconate dehydrogenase-like, C-terminal domain superfamily / NAD(P)-binding Rossmann-like Domain / NAD(P)-binding domain superfamily ...Ketol-acid reductoisomerase, C-terminal / Ketol-acid reductoisomerase / Ketol-acid reductoisomerase, N-terminal / Ketol-acid reductoisomerase, C-terminal domain / Acetohydroxy acid isomeroreductase, NADPH-binding domain / KARI N-terminal domain profile. / KARI C-terminal domain profile. / 6-phosphogluconate dehydrogenase-like, C-terminal domain superfamily / NAD(P)-binding Rossmann-like Domain / NAD(P)-binding domain superfamily / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
cyclopropane-1,1-dicarboxylic acid / 1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE / Putative ketol-acid reductoisomerase 2
Similarity search - Component
Biological speciesSaccharolobus solfataricus (archaea)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.38 Å
AuthorsChen, C.Y. / Chang, Y.C. / Lin, K.F. / Huang, C.H. / Lin, B.L. / Ko, T.P. / Hsieh, D.L. / Tsai, M.D.
Funding support Taiwan, 2items
OrganizationGrant numberCountry
Ministry of Science and Technology (Taiwan)AS-KPQ-105-TPP Taiwan
Ministry of Science and Technology (Taiwan)OST 106-2113-M-008-011 Taiwan
CitationJournal: J Am Chem Soc / Year: 2019
Title: Use of Cryo-EM To Uncover Structural Bases of pH Effect and Cofactor Bispecificity of Ketol-Acid Reductoisomerase.
Authors: Chin-Yu Chen / Yuan-Chih Chang / Bo-Lin Lin / Kuan-Fu Lin / Chun-Hsiang Huang / Dong-Lin Hsieh / Tzu-Ping Ko / Ming-Daw Tsai /
Abstract: While cryo-EM is revolutionizing structural biology, its impact on enzymology is yet to be fully demonstrated. The ketol-acid reductoisomerase (KARI) catalyzes conversion of (2 S)-acetolactate or (2 ...While cryo-EM is revolutionizing structural biology, its impact on enzymology is yet to be fully demonstrated. The ketol-acid reductoisomerase (KARI) catalyzes conversion of (2 S)-acetolactate or (2 S)-aceto-2-hydroxybutyrate to 2,3-dihydroxy-3-alkylbutyrate. We found that KARI from archaea Sulfolobus solfataricus (Sso-KARI) is unusual in being a dodecamer, bispecific to NADH and NADPH, and losing activity above pH 7.8. While crystals were obtainable only at pH 8.5, cryo-EM structures were solved at pH 7.5 and 8.5 for Sso-KARI:2Mg. The results showed that the distances of the two catalytic Mg ions are lengthened in both structures at pH 8.5. We next solved cryo-EM structures of two Sso-KARI complexes, with NADH+inhibitor and NADPH+inhibitor at pH 7.5, which indicate that the bispecificity can be attributed to a unique asparagine at the cofactor binding loop. Unexpectedly, Sso-KARI also differs from other KARI enzymes in lacking "induced-fit", reflecting structural rigidity. Thus, cryo-EM is powerful for structural and mechanistic enzymology.
History
DepositionJan 30, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 17, 2019Provider: repository / Type: Initial release
Revision 1.1May 1, 2019Group: Data collection / Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 1.2Mar 27, 2024Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / pdbx_initial_refinement_model / pdbx_struct_conn_angle / struct_conn
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type / _pdbx_struct_conn_angle.ptnr1_auth_asym_id / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _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_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id

-
Structure visualization

Movie
  • Deposited structure unit
  • Imaged by Jmol
  • Download
  • Superimposition on EM map
  • EMDB-9801
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Putative ketol-acid reductoisomerase 2
B: Putative ketol-acid reductoisomerase 2
C: Putative ketol-acid reductoisomerase 2
D: Putative ketol-acid reductoisomerase 2
E: Putative ketol-acid reductoisomerase 2
F: Putative ketol-acid reductoisomerase 2
G: Putative ketol-acid reductoisomerase 2
H: Putative ketol-acid reductoisomerase 2
I: Putative ketol-acid reductoisomerase 2
J: Putative ketol-acid reductoisomerase 2
K: Putative ketol-acid reductoisomerase 2
L: Putative ketol-acid reductoisomerase 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)457,18072
Polymers446,75812
Non-polymers10,42160
Water3,459192
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

-
Components

#1: Protein
Putative ketol-acid reductoisomerase 2 / Acetohydroxy-acid isomeroreductase 2 / Alpha-keto-beta-hydroxylacyl reductoisomerase 2


Mass: 37229.855 Da / Num. of mol.: 12
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2) (archaea)
Strain: ATCC 35092 / DSM 1617 / JCM 11322 / P2 / Gene: ilvC2, ilvC-2, SSO1322 / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3)
References: UniProt: Q97YJ9, ketol-acid reductoisomerase (NADP+)
#2: Chemical...
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 36 / Source method: obtained synthetically / Formula: Mg
#3: Chemical
ChemComp-NAI / 1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE / NADH


Mass: 665.441 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: C21H29N7O14P2
#4: Chemical
ChemComp-9TY / cyclopropane-1,1-dicarboxylic acid


Mass: 130.099 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: C5H6O4
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 192 / Source method: isolated from a natural source / Formula: H2O

-
Experimental details

-
Experiment

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

-
Sample preparation

ComponentName: Cryo-EM Structure of Sulfolobus solfataricus ketol-acid reductoisomerase (Sso-KARI) dodecamer in complex with Mg2+, NADH, and CPD at pH7.5
Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.446 MDa / Experimental value: YES
Source (natural)Organism: Sulfolobus solfataricus P2 (archaea)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7.5
Buffer component
IDConc.NameFormulaBuffer-ID
120 mMTris-HCl(HOCH2)3CNH21
250 mMSodium chlorideNaCl1
35 mMMagnesium chlorideMgCl21
SpecimenConc.: 0.15 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 298 K

-
Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 1.31 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON II (4k x 4k)

-
Processing

EM software
IDNameVersionCategory
1cisTEM1.0.0-betaparticle selection
4cisTEM1.0.0-betaCTF correction
7UCSF Chimera1.13.1model fitting
8Coot0.8.9.1model fitting
10PHENIXdev-3339model refinement
11cisTEM1.0.0-betainitial Euler assignment
12cisTEM1.0.0-betafinal Euler assignment
13cisTEM1.0.0-betaclassification
14cisTEM1.0.0-beta3D reconstruction
CTF correctionType: PHASE FLIPPING ONLY
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.38 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 18522 / Algorithm: BACK PROJECTION / Symmetry type: POINT
Atomic model buildingB value: 117.95 / Protocol: RIGID BODY FIT / Space: REAL
Atomic model buildingPDB-ID: 6JCV

6jcv


Pdb chain-ID: A / Accession code: 6JCV / Source name: PDB / Type: experimental model

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more