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- EMDB-23814: Autoinhibited B-Raf:(14-3-3)2 complex with resolved RBD -

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Basic information

Entry
Database: EMDB / ID: EMD-23814
TitleAutoinhibited B-Raf:(14-3-3)2 complex with resolved RBD
Map dataAutoinhibited B-Raf:(14-3-3)2 complex with resolved RBD
Sample
  • Complex: Autoinhibited B-Raf:(14-3-3)2 complex with resolved RBD
    • Protein or peptide: Serine/threonine-protein kinase B-raf
    • Protein or peptide: 14-3-3 protein zeta/delta
  • Ligand: ZINC ION
KeywordsB-Raf / 14-3-3 / B-Raf complex / B-Raf monomer / Inactive B-Raf / Serine/threonine-protein kinase B-raf / RBD / signaling protein
Function / homology
Function and homology information


synaptic target recognition / Golgi reassembly / positive regulation of axon regeneration / NOTCH4 Activation and Transmission of Signal to the Nucleus / CD4-positive, alpha-beta T cell differentiation / CD4-positive or CD8-positive, alpha-beta T cell lineage commitment / negative regulation of synaptic vesicle exocytosis / establishment of Golgi localization / Signalling to p38 via RIT and RIN / respiratory system process ...synaptic target recognition / Golgi reassembly / positive regulation of axon regeneration / NOTCH4 Activation and Transmission of Signal to the Nucleus / CD4-positive, alpha-beta T cell differentiation / CD4-positive or CD8-positive, alpha-beta T cell lineage commitment / negative regulation of synaptic vesicle exocytosis / establishment of Golgi localization / Signalling to p38 via RIT and RIN / respiratory system process / head morphogenesis / ARMS-mediated activation / tube formation / regulation of synapse maturation / endothelial cell apoptotic process / myeloid progenitor cell differentiation / SHOC2 M1731 mutant abolishes MRAS complex function / Gain-of-function MRAS complexes activate RAF signaling / positive regulation of D-glucose transmembrane transport / negative regulation of fibroblast migration / Rap1 signalling / establishment of protein localization to membrane / positive regulation of axonogenesis / negative regulation of protein localization to nucleus / regulation of T cell differentiation / Negative feedback regulation of MAPK pathway / KSRP (KHSRP) binds and destabilizes mRNA / Frs2-mediated activation / GP1b-IX-V activation signalling / stress fiber assembly / face development / MAP kinase kinase activity / thyroid gland development / Interleukin-3, Interleukin-5 and GM-CSF signaling / Regulation of localization of FOXO transcription factors / synaptic vesicle exocytosis / somatic stem cell population maintenance / positive regulation of peptidyl-serine phosphorylation / Activation of BAD and translocation to mitochondria / phosphoserine residue binding / MAP kinase kinase kinase activity / postsynaptic modulation of chemical synaptic transmission / negative regulation of endothelial cell apoptotic process / regulation of ERK1 and ERK2 cascade / protein targeting / Chk1/Chk2(Cds1) mediated inactivation of Cyclin B:Cdk1 complex / SARS-CoV-2 targets host intracellular signalling and regulatory pathways / cellular response to glucose starvation / RHO GTPases activate PKNs / SARS-CoV-1 targets host intracellular signalling and regulatory pathways / positive regulation of stress fiber assembly / negative regulation of TORC1 signaling / ERK1 and ERK2 cascade / positive regulation of substrate adhesion-dependent cell spreading / Transcriptional and post-translational regulation of MITF-M expression and activity / substrate adhesion-dependent cell spreading / lung development / protein sequestering activity / cellular response to calcium ion / negative regulation of innate immune response / thymus development / hippocampal mossy fiber to CA3 synapse / animal organ morphogenesis / TP53 Regulates Metabolic Genes / Translocation of SLC2A4 (GLUT4) to the plasma membrane / Deactivation of the beta-catenin transactivating complex / Spry regulation of FGF signaling / RAF activation / Negative regulation of NOTCH4 signaling / Signaling by high-kinase activity BRAF mutants / MAP2K and MAPK activation / visual learning / regulation of protein stability / centriolar satellite / cellular response to xenobiotic stimulus / epidermal growth factor receptor signaling pathway / long-term synaptic potentiation / Negative regulation of MAPK pathway / Signaling by RAF1 mutants / Signaling by moderate kinase activity BRAF mutants / Paradoxical activation of RAF signaling by kinase inactive BRAF / Signaling downstream of RAS mutants / Signaling by BRAF and RAF1 fusions / intracellular protein localization / melanosome / T cell differentiation in thymus / T cell receptor signaling pathway / presynapse / MAPK cascade / regulation of cell population proliferation / cell body / scaffold protein binding / angiogenesis / protein phosphatase binding / blood microparticle / vesicle / DNA-binding transcription factor binding / negative regulation of neuron apoptotic process / transmembrane transporter binding / positive regulation of ERK1 and ERK2 cascade
Similarity search - Function
Raf-like Ras-binding domain / Raf-like Ras-binding / Ras-binding domain (RBD) profile. / Raf-like Ras-binding domain / Diacylglycerol/phorbol-ester binding / : / Phorbol esters/diacylglycerol binding domain (C1 domain) / Zinc finger phorbol-ester/DAG-type signature. / Zinc finger phorbol-ester/DAG-type profile. / Protein kinase C conserved region 1 (C1) domains (Cysteine-rich domains) ...Raf-like Ras-binding domain / Raf-like Ras-binding / Ras-binding domain (RBD) profile. / Raf-like Ras-binding domain / Diacylglycerol/phorbol-ester binding / : / Phorbol esters/diacylglycerol binding domain (C1 domain) / Zinc finger phorbol-ester/DAG-type signature. / Zinc finger phorbol-ester/DAG-type profile. / Protein kinase C conserved region 1 (C1) domains (Cysteine-rich domains) / Protein kinase C-like, phorbol ester/diacylglycerol-binding domain / C1-like domain superfamily / 14-3-3 proteins signature 2. / 14-3-3 protein, conserved site / 14-3-3 proteins signature 1. / 14-3-3 protein / 14-3-3 homologues / 14-3-3 domain / 14-3-3 domain superfamily / 14-3-3 protein / Serine-threonine/tyrosine-protein kinase, catalytic domain / Protein tyrosine and serine/threonine kinase / Ubiquitin-like domain superfamily / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Serine/Threonine protein kinases, catalytic domain / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Serine/threonine-protein kinase B-raf / 14-3-3 protein zeta/delta
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.07 Å
AuthorsMartinez Fiesco JA / Ping Z
Funding support United States, 2 items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)ZIA BC 011744 United States
National Institutes of Health/National Cancer Institute (NIH/NCI)ZIA BC 010329 United States
CitationJournal: Nat Commun / Year: 2022
Title: Structural insights into the BRAF monomer-to-dimer transition mediated by RAS binding.
Authors: Juliana A Martinez Fiesco / David E Durrant / Deborah K Morrison / Ping Zhang /
Abstract: RAF kinases are essential effectors of RAS, but how RAS binding initiates the conformational changes needed for autoinhibited RAF monomers to form active dimers has remained unclear. Here, we present ...RAF kinases are essential effectors of RAS, but how RAS binding initiates the conformational changes needed for autoinhibited RAF monomers to form active dimers has remained unclear. Here, we present cryo-electron microscopy structures of full-length BRAF complexes derived from mammalian cells: autoinhibited, monomeric BRAF:14-3-3:MEK and BRAF:14-3-3 complexes, and an inhibitor-bound, dimeric BRAF:14-3-3 complex, at 3.7, 4.1, and 3.9 Å resolution, respectively. In both autoinhibited, monomeric structures, the RAS binding domain (RBD) of BRAF is resolved, revealing that the RBD forms an extensive contact interface with the 14-3-3 protomer bound to the BRAF C-terminal site and that key basic residues required for RBD-RAS binding are exposed. Moreover, through structure-guided mutational studies, our findings indicate that RAS-RAF binding is a dynamic process and that RBD residues at the center of the RBD:14-3-3 interface have a dual function, first contributing to RAF autoinhibition and then to the full spectrum of RAS-RBD interactions.
History
DepositionApr 9, 2021-
Header (metadata) releaseJan 26, 2022-
Map releaseJan 26, 2022-
UpdateJun 4, 2025-
Current statusJun 4, 2025Processing site: RCSB / 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 cylindrical radius
  • Surface level: 0.04
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7mfe
  • Surface level: 0.04
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_23814.png

Downloads & links

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Map

FileDownload / File: emd_23814.map.gz / Format: CCP4 / Size: 8.4 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationAutoinhibited B-Raf:(14-3-3)2 complex with resolved RBD
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.35 Å/pix.
x 130 pix.
= 175.24 Å		1.35 Å/pix.
x 130 pix.
= 175.24 Å		1.35 Å/pix.
x 130 pix.
= 175.24 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.348 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.04 / Movie #1: 0.04
Minimum - Maximum-0.16642368 - 0.28564534
Average (Standard dev.)0.0006241318 (±0.0071285143)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions130130130
Spacing130130130
CellA=B=C: 175.24 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.3481.3481.348
M x/y/z130130130
origin x/y/z0.0000.0000.000
length x/y/z175.240175.240175.240
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS130130130
D min/max/mean-0.1660.2860.001

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Supplemental data

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Sample components

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Entire : Autoinhibited B-Raf:(14-3-3)2 complex with resolved RBD

EntireName: Autoinhibited B-Raf:(14-3-3)2 complex with resolved RBD
Components
  • Complex: Autoinhibited B-Raf:(14-3-3)2 complex with resolved RBD
    • Protein or peptide: Serine/threonine-protein kinase B-raf
    • Protein or peptide: 14-3-3 protein zeta/delta
  • Ligand: ZINC ION

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Supramolecule #1: Autoinhibited B-Raf:(14-3-3)2 complex with resolved RBD

SupramoleculeName: Autoinhibited B-Raf:(14-3-3)2 complex with resolved RBD
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Serine/threonine-protein kinase B-raf

MacromoleculeName: Serine/threonine-protein kinase B-raf / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: non-specific serine/threonine protein kinase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 84.697695 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MAALSGGGGG GAEPGQALFN GDMEPEAGAG AGAAASSAAD PAIPEEVWNI KQMIKLTQEH IEALLDKFGG EHNPPSIYLE AYEEYTSKL DALQQREQQL LESLGNGTDF SVSSSASMDT VTSSSSSSLS VLPSSLSVFQ NPTDVARSNP KSPQKPIVRV F LPNKQRTV ...String:
MAALSGGGGG GAEPGQALFN GDMEPEAGAG AGAAASSAAD PAIPEEVWNI KQMIKLTQEH IEALLDKFGG EHNPPSIYLE AYEEYTSKL DALQQREQQL LESLGNGTDF SVSSSASMDT VTSSSSSSLS VLPSSLSVFQ NPTDVARSNP KSPQKPIVRV F LPNKQRTV VPARCGVTVR DSLKKALMMR GLIPECCAVY RIQDGEKKPI GWDTDISWLT GEELHVEVLE NVPLTTHNFV RK TFFTLAF CDFCRKLLFQ GFRCQTCGYK FHQRCSTEVP LMCVNYDQLD LLFVSKFFEH HPIPQEEASL AETALTSGSS PSA PASDSI GPQILTSPSP SKSIPIPQPF RPADEDHRNQ FGQRDRSS(SEP)A PNVHINTIEP VNIDDLIRDQ GFRGDGGSTT GLSATPPAS LPGSLTNVKA LQKSPGPQRE RKSSSSSEDR NRMKTLGRRD SSDDWEIPDG QITVGQRIGS GSFGTVYKGK W HGDVAVKM LNVTAPTPQQ LQAFKNEVGV LRKTRHVNIL LFMGYSTKPQ LAIVTQWCEG SSLYHHLHII ETKFEMIKLI DI ARQTAQG MDYLHAKSII HRDLKSNNIF LHEDLTVKIG DFGLATVKSR WSGSHQFEQL SGSILWMAPE VIRMQDKNPY SFQ SDVYAF GIVLYELMTG QLPYSNINNR DQIIFMVGRG YLSPDLSKVR SNCPKAMKRL MAECLKKKRD ERPLFPQILA SIEL LARSL PKIHRSA(SEP)EP SLNRAGFQTE DFSLYACASP KTPIQAGGYG AFPVH

UniProtKB: Serine/threonine-protein kinase B-raf

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Macromolecule #2: 14-3-3 protein zeta/delta

MacromoleculeName: 14-3-3 protein zeta/delta / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 27.777092 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MDKNELVQKA KLAEQAERYD DMAACMKSVT EQGAELSNEE RNLLSVAYKN VVGARRSSWR VVSSIEQKTE GAEKKQQMAR EYREKIETE LRDICNDVLS LLEKFLIPNA SQAESKVFYL KMKGDYYRYL AEVAAGDDKK GIVDQSQQAY QEAFEISKKE M QPTHPIRL ...String:
MDKNELVQKA KLAEQAERYD DMAACMKSVT EQGAELSNEE RNLLSVAYKN VVGARRSSWR VVSSIEQKTE GAEKKQQMAR EYREKIETE LRDICNDVLS LLEKFLIPNA SQAESKVFYL KMKGDYYRYL AEVAAGDDKK GIVDQSQQAY QEAFEISKKE M QPTHPIRL GLALNFSVFY YEILNSPEKA CSLAKTAFDE AIAELDTLSE ESYKDSTLIM QLLRDNLTLW TSDTQGDEAE AG EGGEN

UniProtKB: 14-3-3 protein zeta/delta

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Macromolecule #3: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 3 / Number of copies: 2 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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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

Concentration0.2 mg/mL
BufferpH: 8
Component:
ConcentrationName
20.0 mMTris
200.0 mMNaCl
10.0 mMDTT
VitrificationCryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 57.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: PDB ENTRY
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.07 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 198731
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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