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- EMDB-31429: Cryo-EM structure of the type 2 bradykinin receptor in complex wi... -

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Entry
Database: EMDB / ID: EMD-31429
TitleCryo-EM structure of the type 2 bradykinin receptor in complex with the bradykinin and an Gq protein
Map data
Sample
  • Complex: Cryo-EM structure of the type 2 bradykinin receptor in complex with the bradykinin and an Gq protein
    • Complex: G subunit q (Gi2-mini-Gq chimeric)
      • Protein or peptide: G subunit q (Gi1-Gq chimeric)
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Complex: ARG-PRO-PRO-GLY-PHE-SER-PRO-PHE-ARG
      • Protein or peptide: ARG-PRO-PRO-GLY-PHE-SER-PRO-PHE-ARG
    • Complex: Type 2 bradykinin receptor
      • Protein or peptide: B2 bradykinin receptor
    • Complex: single Fab chain (svFv16)
      • Protein or peptide: single Fab chain (svFv16)
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
KeywordsGPCR / Complex / MEMBRANE PROTEIN
Function / homology
Function and homology information


negative regulation of intrinsic apoptotic signaling pathway in response to osmotic stress by p53 class mediator / intrinsic apoptotic signaling pathway in response to osmotic stress by p53 class mediator / bradykinin receptor activity / vasoconstriction / type 1 angiotensin receptor binding / regulation of vascular permeability / phosphatidylinositol-4,5-bisphosphate phospholipase C activity / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors ...negative regulation of intrinsic apoptotic signaling pathway in response to osmotic stress by p53 class mediator / intrinsic apoptotic signaling pathway in response to osmotic stress by p53 class mediator / bradykinin receptor activity / vasoconstriction / type 1 angiotensin receptor binding / regulation of vascular permeability / phosphatidylinositol-4,5-bisphosphate phospholipase C activity / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Ca2+ pathway / G alpha (z) signalling events / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / G alpha (q) signalling events / blood circulation / G alpha (i) signalling events / Thrombin signalling through proteinase activated receptors (PARs) / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through PLC beta / ADP signalling through P2Y purinoceptor 1 / Thromboxane signalling through TP receptor / Presynaptic function of Kainate receptors / G beta:gamma signalling through CDC42 / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G alpha (12/13) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through BTK / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Ca2+ pathway / Thrombin signalling through proteinase activated receptors (PARs) / arachidonate secretion / G alpha (z) signalling events / Extra-nuclear estrogen signaling / photoreceptor outer segment membrane / G alpha (s) signalling events / G alpha (q) signalling events / spectrin binding / G alpha (i) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Vasopressin regulates renal water homeostasis via Aquaporins / alkylglycerophosphoethanolamine phosphodiesterase activity / smooth muscle contraction / photoreceptor outer segment / regulation of vasoconstriction / response to salt stress / cardiac muscle cell apoptotic process / photoreceptor inner segment / cell surface receptor protein tyrosine kinase signaling pathway / Peptide ligand-binding receptors / vasodilation / cellular response to catecholamine stimulus / adenylate cyclase-activating dopamine receptor signaling pathway / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / sensory perception of taste / signaling receptor complex adaptor activity / retina development in camera-type eye / positive regulation of cytosolic calcium ion concentration / cell body / GTPase binding / protease binding / G alpha (i) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / cellular response to hypoxia / cell surface receptor signaling pathway / cell population proliferation / endosome / G protein-coupled receptor signaling pathway / inflammatory response / protein heterodimerization activity / GTPase activity / dendrite / synapse / protein-containing complex binding / membrane / plasma membrane / cytoplasm
Similarity search - Function
Bradykinin receptor B2 / Bradykinin receptor family / : / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain ...Bradykinin receptor B2 / Bradykinin receptor family / : / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily
Similarity search - Domain/homology
B2 bradykinin receptor / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Similarity search - Component
Biological speciesHomo sapiens (human) / Rattus norvegicus (Norway rat) / Bos taurus (domestic cattle) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsYin Y / Jiang Y
Funding support China, 6 items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2018YFA0507002 China
National Natural Science Foundation of China (NSFC)31770796 China
National Natural Science Foundation of China (NSFC)81872915 China
National Natural Science Foundation of China (NSFC)82073904 China
National Natural Science Foundation of China (NSFC)81773792 China
National Natural Science Foundation of China (NSFC)81973373 China
CitationJournal: Nat Struct Mol Biol / Year: 2021
Title: Molecular basis for kinin selectivity and activation of the human bradykinin receptors.
Authors: Yu-Ling Yin / Chenyu Ye / Fulai Zhou / Jia Wang / Dehua Yang / Wanchao Yin / Ming-Wei Wang / H Eric Xu / Yi Jiang /
Abstract: Bradykinin and kallidin are endogenous kinin peptide hormones that belong to the kallikrein-kinin system and are essential to the regulation of blood pressure, inflammation, coagulation and pain ...Bradykinin and kallidin are endogenous kinin peptide hormones that belong to the kallikrein-kinin system and are essential to the regulation of blood pressure, inflammation, coagulation and pain control. Des-Arg-kallidin, the carboxy-terminal des-Arg metabolite of kallidin, and bradykinin selectively activate two G protein-coupled receptors, type 1 and type 2 bradykinin receptors (B1R and B2R), respectively. The hyperactivation of bradykinin receptors, termed 'bradykinin storm', is associated with pulmonary edema in COVID-19 patients, suggesting that bradykinin receptors are important targets for COVID-19 intervention. Here we report two G protein-coupled complex structures of human B1R and B2R bound to des-Arg-kallidin and bradykinin, respectively. Combined with functional analysis, our structures reveal the mechanism of ligand selectivity and specific activation of the bradykinin receptor. These findings also provide a framework for guiding drug design targeting bradykinin receptors for the treatment of inflammation, cardiovascular disorders and COVID-19.
History
DepositionJun 11, 2021-
Header (metadata) releaseOct 13, 2021-
Map releaseOct 13, 2021-
UpdateJul 2, 2025-
Current statusJul 2, 2025Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.04
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.04
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  • Surface view with fitted model
  • Atomic models: PDB-7f2o
  • Surface level: 0.04
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7f2o
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_31429.png

Downloads & links

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Map

FileDownload / File: emd_31429.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 200 pix.
= 209. Å		1.05 Å/pix.
x 200 pix.
= 209. Å		1.05 Å/pix.
x 200 pix.
= 209. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.045 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.01 / Movie #1: 0.04
Minimum - Maximum-0.017442748 - 1.6189098
Average (Standard dev.)0.001921607 (±0.029229019)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions200200200
Spacing200200200
CellA=B=C: 208.99998 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0451.0451.045
M x/y/z200200200
origin x/y/z0.0000.0000.000
length x/y/z209.000209.000209.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS200200200
D min/max/mean-0.0171.6190.002

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Supplemental data

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Sample components

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Entire : Cryo-EM structure of the type 2 bradykinin receptor in complex wi...

EntireName: Cryo-EM structure of the type 2 bradykinin receptor in complex with the bradykinin and an Gq protein
Components
  • Complex: Cryo-EM structure of the type 2 bradykinin receptor in complex with the bradykinin and an Gq protein
    • Complex: G subunit q (Gi2-mini-Gq chimeric)
      • Protein or peptide: G subunit q (Gi1-Gq chimeric)
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Complex: ARG-PRO-PRO-GLY-PHE-SER-PRO-PHE-ARG
      • Protein or peptide: ARG-PRO-PRO-GLY-PHE-SER-PRO-PHE-ARG
    • Complex: Type 2 bradykinin receptor
      • Protein or peptide: B2 bradykinin receptor
    • Complex: single Fab chain (svFv16)
      • Protein or peptide: single Fab chain (svFv16)
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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Supramolecule #1: Cryo-EM structure of the type 2 bradykinin receptor in complex wi...

SupramoleculeName: Cryo-EM structure of the type 2 bradykinin receptor in complex with the bradykinin and an Gq protein
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #2: G subunit q (Gi2-mini-Gq chimeric)

SupramoleculeName: G subunit q (Gi2-mini-Gq chimeric) / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

SupramoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2

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Supramolecule #4: ARG-PRO-PRO-GLY-PHE-SER-PRO-PHE-ARG

SupramoleculeName: ARG-PRO-PRO-GLY-PHE-SER-PRO-PHE-ARG / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #3
Source (natural)Organism: Rattus norvegicus (Norway rat) / Synthetically produced: Yes

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Supramolecule #5: Type 2 bradykinin receptor

SupramoleculeName: Type 2 bradykinin receptor / type: complex / ID: 5 / Parent: 1 / Macromolecule list: #4
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #6: single Fab chain (svFv16)

SupramoleculeName: single Fab chain (svFv16) / type: complex / ID: 6 / Parent: 1 / Macromolecule list: #5
Source (natural)Organism: Bos taurus (domestic cattle)

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Supramolecule #7: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

SupramoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: complex / ID: 7 / Parent: 1 / Macromolecule list: #6

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Macromolecule #1: G subunit q (Gi1-Gq chimeric)

MacromoleculeName: G subunit q (Gi1-Gq chimeric) / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 41.724383 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGCTLSAEDK AAVERSKMIE KQLQKDKQVY RRTLRLLLLG ADNSGKSTIV KQMRIYHVNG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String:
MGCTLSAEDK AAVERSKMIE KQLQKDKQVY RRTLRLLLLG ADNSGKSTIV KQMRIYHVNG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTSGIFETK FQVDKVNFHM FDVGAQRDER RKWIQCFNDV TAIIFVVDSS DYNRLQEALN DF KSIWNNR WLRTISVILF LNKQDLLAEK VLAGKSKIED YFPEFARYTT PEDATPEPGE DPRVTRAKYF IRKEFVDIST ASG DGRHIC YPHFTCSVDT ENARRIFNDC KDIILQMNLR EYNLV

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Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Rattus norvegicus (Norway rat)
Molecular weightTheoretical: 41.055867 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI ...String:
MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI VTSSGDTTCA LWDIETGQQT TTFTGHTGDV MSLSLAPDTR LFVSGACDAS AKLWDVREGM CRQTFTGHES DI NAICFFP NGNAFATGSD DATCRLFDLR ADQELMTYSH DNIICGITSV SFSKSGRLLL AGYDDFNCNV WDALKADRAG VLA GHDNRV SCLGVTDDGM AVATGSWDSF LKIWNGSSGG GGSGGGGSSG VSGWRLFKKI S

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

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Macromolecule #3: ARG-PRO-PRO-GLY-PHE-SER-PRO-PHE-ARG

MacromoleculeName: ARG-PRO-PRO-GLY-PHE-SER-PRO-PHE-ARG / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 1.062224 KDa
SequenceString:
RPPGFSPFR

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Macromolecule #4: B2 bradykinin receptor

MacromoleculeName: B2 bradykinin receptor / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 67.152914 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: ADLEDNWETL NDNLKVIEKA DNAAQVKDAL TKMRAAALDA QKATPPKLED KSPDSPEMKD FRHGFDILVG QIDDALKLAN EGKVKEAQA AAEQLKTTRN AYIQKYLGTF AQSKCPQVEW LGWLNTIQPP FLWVLFVLAT LENIFVLSVF CLHKSSCTVA E IYLGNLAA ...String:
ADLEDNWETL NDNLKVIEKA DNAAQVKDAL TKMRAAALDA QKATPPKLED KSPDSPEMKD FRHGFDILVG QIDDALKLAN EGKVKEAQA AAEQLKTTRN AYIQKYLGTF AQSKCPQVEW LGWLNTIQPP FLWVLFVLAT LENIFVLSVF CLHKSSCTVA E IYLGNLAA ADLILACGLP FWAITISNNF DWLFGETLCR VVNAIISMNL YSSIWFLMLV SIDRYLALVK TMSMGRMRGV RW AKLYSLV IWGCTLLLSS PMLVFRTMKE YSDEGHNVTA CVISYPSLIW EVFTNMLLNV VGFLLPLSVI TFCTMQIMQV LRN NEMQKF KEIQTERRAT VLVLVVLLLF IICWLPFQIS TFLDTLHRLG ILSSCQDERI IDVITQIASF MAYSNSCLNP LVYV IVGKR FRKKSWEVYQ GVCQKGGCRS EPIQMENSMG TLVFTLEDFV GDWEQTAAYN LDQVLEQGGV SSLLQNLAVS VTPIQ RIVR SGENALKIDI HVIIPYEGLS ADQMAQIEEV FKVVYPVDDH HFKVILPYGT LVIDGVTPNM LNYFGRPYEG IAVFDG KKI TVTGTLWNGN KIIDERLITP DGSMLFRVTI NS

UniProtKB: B2 bradykinin receptor

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Macromolecule #5: single Fab chain (svFv16)

MacromoleculeName: single Fab chain (svFv16) / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 26.392385 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SAGGGGSGGG GSGGGGSADI VMTQATSSVP VTPGESVSIS C RSSKSLLH ...String:
DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SAGGGGSGGG GSGGGGSADI VMTQATSSVP VTPGESVSIS C RSSKSLLH SNGNTYLYWF LQRPGQSPQL LIYRMSNLAS GVPDRFSGSG SGTAFTLTIS RLEAEDVGVY YCMQHLEYPL TF GAGTKLE L

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Macromolecule #6: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (domestic cattle)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: OTHER / Average electron dose: 80.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: OTHER
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: NONE
Startup modelType of model: PDB ENTRY
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 664416
Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER

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