General Information of Target

Target ID LDTP03087
Target Name C4b-binding protein beta chain (C4BPB)
Gene Name C4BPB
Gene ID 725
Synonyms
C4b-binding protein beta chain
3D Structure
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2D Sequence (FASTA)
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3D Structure (PDB)
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Sequence
MFFWCACCLMVAWRVSASDAEHCPELPPVDNSIFVAKEVEGQILGTYVCIKGYHLVGKKT
LFCNASKEWDNTTTECRLGHCPDPVLVNGEFSSSGPVNVSDKITFMCNDHYILKGSNRSQ
CLEDHTWAPPFPICKSRDCDPPGNPVHGYFEGNNFTLGSTISYYCEDRYYLVGVQEQQCV
DGEWSSALPVCKLIQEAPKPECEKALLAFQESKNLCEAMENFMQQLKESGMTMEELKYSL
ELKKAELKAKLL
Target Bioclass
Other
Subcellular location
Secreted
Function
Controls the classical pathway of complement activation. It binds as a cofactor to C3b/C4b inactivator (C3bINA), which then hydrolyzes the complement fragment C4b. It also accelerates the degradation of the C4bC2a complex (C3 convertase) by dissociating the complement fragment C2a. It also interacts with anticoagulant protein S and with serum amyloid P component. The beta chain binds protein S.
Uniprot ID
P20851
Ensemble ID
ENST00000243611.9
HGNC ID
HGNC:1328

Target Site Mutations in Different Cell Lines

Cell line Mutation details Probe for labeling this protein in this cell
EFO27 SNV: p.I194T .
NCIH446 SNV: p.P198S .

Probe(s) Labeling This Target

ABPP Probe
Click To Hide/Show 4 Probe Related to This Target
Probe name Structure Binding Site(Ratio) Interaction ID Ref
DBIA
 Probe Info 
C202(1.64)  LDD3424  [1]
NAIA_4
 Probe Info 
N.A.  LDD2226  [2]
IPM
 Probe Info 
N.A.  LDD0147  [3]
TFBX
 Probe Info 
N.A.  LDD0148  [3]

Competitor(s) Related to This Target

Competitor ID Name Cell line Binding Site(Ratio) Interaction ID Ref
 LDCM0022  KB02 Hep 3B2.1-7 C202(5.69)  LDD2353  [1]
 LDCM0023  KB03 Hep 3B2.1-7 C202(4.36)  LDD2770  [1]
 LDCM0024  KB05 SK-HEP1 C202(1.64)  LDD3424  [1]

The Interaction Atlas With This Target

The Drug(s) Related To This Target

Approved
Click To Hide/Show 4 Drug(s) Interacting with This Target
Drug Name Drug Type External ID
Zinc . DB01593
Zinc Acetate . DB14487
Zinc Chloride . DB14533
Zinc Sulfate Unspecified Form . DB14548

References

1 DrugMap: A quantitative pan-cancer analysis of cysteine ligandability. Cell. 2024 May 9;187(10):2536-2556.e30. doi: 10.1016/j.cell.2024.03.027. Epub 2024 Apr 22.
Mass spectrometry data entry: PXD047840
2 N-Acryloylindole-alkyne (NAIA) enables imaging and profiling new ligandable cysteines and oxidized thiols by chemoproteomics. Nat Commun. 2023 Jun 15;14(1):3564. doi: 10.1038/s41467-023-39268-w.
Mass spectrometry data entry: PXD041264
3 Chemoproteomic Profiling by Cysteine Fluoroalkylation Reveals Myrocin G as an Inhibitor of the Nonhomologous End Joining DNA Repair Pathway. J Am Chem Soc. 2021 Dec 8;143(48):20332-20342. doi: 10.1021/jacs.1c09724. Epub 2021 Nov 24.
Mass spectrometry data entry: PXD029255