P00751 (CFAB_HUMAN) Homo sapiens (Human)

Complement factor B UniProtKBInterProSTRINGInteractive Modelling

764 aa; Sequence (Fasta) ; (Isoform 2; ) Identical sequences: Homo sapiens: A0A1U9X7H8

Sequence Features

 526Charge relay system.
 576Charge relay system.
 699Charge relay system.
 9L -> H (in dbSNP:rs4151667). VAR_016274 dbSNP
 28W -> Q (in allele FA; requires 2 nucleotide substitutions). VAR_006493
 28W -> R (in allele S). VAR_006492
 32R -> Q (in allele S; dbSNP:rs641153). VAR_006494 dbSNP
 32R -> W (in dbSNP:rs12614). VAR_016275 dbSNP
 166S -> P (in AHUS4). VAR_063659
 203R -> Q (in AHUS4; dbSNP:rs745794224). VAR_063660 dbSNP
 242I -> L (in AHUS4; dbSNP:rs144812066). VAR_063661 dbSNP
 252G -> S (in dbSNP:rs4151651). VAR_016276 dbSNP
 286F -> L (in AHUS4; gain-of-function mutation that results in enhanced formation of the C3bBb; dbSNP:rs117905900). VAR_063221 dbSNP
 323K -> E (in AHUS4; gain-of-function mutation that results in enhanced formation of the C3bBb; dbSNP:rs121909748). VAR_063222 dbSNP
 323K -> Q (in AHUS4). VAR_063662
 458M -> I (in AHUS4; dbSNP:rs200837114). VAR_063663 dbSNP
 533K -> R (in AHUS4; dbSNP:rs149101394). VAR_063664 dbSNP
 565K -> E (in dbSNP:rs4151659). VAR_016277 dbSNP
 651D -> E (in dbSNP:rs4151660). VAR_016278 dbSNP
 736A -> S (in allele FA). VAR_006495
 37-76
 62-98
 103-145
 131-158
 165-205
 191-218
 478-596
 511-527
 599-615
 656-682
 695-725
 53-84Sushi/SCR/CCP domain
IPR000436PF00084
 103-158Sushi/SCR/CCP domain
IPR000436PF00084
 176-218Sushi/SCR/CCP domain
IPR000436PF00084
 270-467von Willebrand factor, type A
IPR002035PF00092
 483-751Serine proteases, trypsin domain
IPR001254PF00089

Sequence Alignments

Experimental structures

DescriptionOligo-stateLigandsStructureRangeDownloadAssess
Crystal Structure of Complement C3b in complex with Factors B and D Heteromer
P01024; P00746;
GOL;MG;BMA;NAG;2xwb35-764
Crystal Structure of Complement C3b in Complex with Factor B Heteromer
P01024;
NI;NAG;2xwj35-764
Cobra Venom Factor (CVF) in complex with human factor B Heteromer
Q91132;
K;PO4;MG;NAG;P6G;3hrz36-764
Cobra Venom Factor (CVF) in complex with human factor B Heteromer
P00751; Q91132;
MG; 11×NAG;3hs036-764
C3 convertase (C3bBb) stabilized by SCIN Heteromer
P00751; P01024; Q6GFB4;
MG;BMA;NAG;NDG;MAN;2win260-764
Properdin in complex with alternative pathway C3 convertase Heteromer
P00751; P01024; Q6GFB4;
MG;BMA; 16×NAG; 10×MAN;5m6w260-764
FACTOR B SERINE PROTEASE DOMAIN Heteromer
P00751;
1dle470-764
Human Complement factor Bmonomer 13×GOL;BMA;NAG;MAN;2ok534-764
Crystal Structure Analysis of the Bb segment of Factor Bmonomer NA;IOD;CO;1rrk268-764
Crystal Structure Analysis of the Bb segment of Factor B complexed with 4-guanidinobenzoic acidmonomer NA;MG;IOD;GBS;1rtk268-764
'Crystal Structure Analysis of the Bb segment of Factor B complexed with Di-isopropyl-phosphate (...monomer NA;MG;IOD;DFP;1rs0268-764
Complement factor B protease domain in complex with the reversible inhibitor N-(2-bromo-4-methyln...monomer JGT;SO4;6qsw475-764
Complement factor B protease domain in complex with the reversible inhibitor 4-((2S,4S)-4-ethoxy-...monomer JGQ;SO4;6rav476-764
Complement factor B protease domain in complex with the reversible inhibitor ((2S,4S)-1-((5,7-dim...monomer SO4;JGN;6qsx476-764
A domain of Factor Bmonomer MN;1q0p268-476

Homology models built on isoform sequence

Isoform #Oligo-stateLigandsQMEANTemplateRangeSeq id (%)ReportDownloadAssess
2monomer-0.142ok5.1.A34-542
100.00
2monomer-1.312xwb.1.C35-594
92.77
2monomer-1.582ok5.1.A34-595
93.07