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1q0p

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Revision as of 07:40, 9 December 2020

A domain of Factor B

Structural highlights

1q0p is a 1 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Gene:	BF (HUMAN)
Activity:	Alternative-complement-pathway C3/C5 convertase, with EC number 3.4.21.47
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[CFAB_HUMAN] Defects in CFB are a cause of susceptibility to hemolytic uremic syndrome atypical type 4 (AHUS4) [MIM:612924]. An atypical form of hemolytic uremic syndrome. It is a complex genetic disease characterized by microangiopathic hemolytic anemia, thrombocytopenia, renal failure and absence of episodes of enterocolitis and diarrhea. In contrast to typical hemolytic uremic syndrome, atypical forms have a poorer prognosis, with higher death rates and frequent progression to end-stage renal disease. Note=Susceptibility to the development of atypical hemolytic uremic syndrome can be conferred by mutations in various components of or regulatory factors in the complement cascade system. Other genes may play a role in modifying the phenotype.^[1] ^[2]

Function

[CFAB_HUMAN] Factor B which is part of the alternate pathway of the complement system is cleaved by factor D into 2 fragments: Ba and Bb. Bb, a serine protease, then combines with complement factor 3b to generate the C3 or C5 convertase. It has also been implicated in proliferation and differentiation of preactivated B-lymphocytes, rapid spreading of peripheral blood monocytes, stimulation of lymphocyte blastogenesis and lysis of erythrocytes. Ba inhibits the proliferation of preactivated B-lymphocytes.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Complement factor B is a 90 kDa protein consisting of three domains: a three-module complement control protein, a von Willebrand factor A domain, and a C-terminal serine protease (SP) domain that adopts a default inactive (zymogen) conformation. The interaction between factor B and pathogen-bound C3b is mediated by its A domain, triggering a conformational change in factor B that ultimately creates the "C3 convertase" of the alternative complement pathway. We report the crystal structure of the A domain from factor B and show that it contains an integrin-like MIDAS motif that adopts the "open" conformation typical of integrin-ligand complexes, with an acidic residue (provided by a fortuitous crystal contact) completing the coordination of the metal ion. Modeling studies indicate that the factor B A domain can also adopt the closed conformation, supporting the hypothesis that an "integrin-like switch" is conserved in complement proteins and perhaps in 60 other A domains found within the human proteome.

Crystal structure of the A domain from complement factor B reveals an integrin-like open conformation.,Bhattacharya AA, Lupher ML Jr, Staunton DE, Liddington RC Structure. 2004 Mar;12(3):371-8. PMID:15016353^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Goicoechea de Jorge E, Harris CL, Esparza-Gordillo J, Carreras L, Arranz EA, Garrido CA, Lopez-Trascasa M, Sanchez-Corral P, Morgan BP, Rodriguez de Cordoba S. Gain-of-function mutations in complement factor B are associated with atypical hemolytic uremic syndrome. Proc Natl Acad Sci U S A. 2007 Jan 2;104(1):240-5. Epub 2006 Dec 20. PMID:17182750 doi:10.1073/pnas.0603420103
↑ Maga TK, Nishimura CJ, Weaver AE, Frees KL, Smith RJ. Mutations in alternative pathway complement proteins in American patients with atypical hemolytic uremic syndrome. Hum Mutat. 2010 Jun;31(6):E1445-60. doi: 10.1002/humu.21256. PMID:20513133 doi:10.1002/humu.21256
↑ Bhattacharya AA, Lupher ML Jr, Staunton DE, Liddington RC. Crystal structure of the A domain from complement factor B reveals an integrin-like open conformation. Structure. 2004 Mar;12(3):371-8. PMID:15016353 doi:10.1016/j.str.2004.02.012

1 Structural highlights
2 Disease
3 Function
4 Evolutionary Conservation
5 Publication Abstract from PubMed
6 See Also
7 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1q0p"

@@ Line 1: / Line 1: @@
 ==A domain of Factor B==
-<StructureSection load='1q0p' size='340' side='right' caption='[[1q0p]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
+<StructureSection load='1q0p' size='340' side='right'caption='[[1q0p]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1q0p]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q0P OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Q0P FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1q0p]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q0P OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1Q0P FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BF ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Alternative-complement-pathway_C3/C5_convertase Alternative-complement-pathway C3/C5 convertase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.47 3.4.21.47] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1q0p FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q0p OCA], [http://pdbe.org/1q0p PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1q0p RCSB], [http://www.ebi.ac.uk/pdbsum/1q0p PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1q0p ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1q0p FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q0p OCA], [http://pdbe.org/1q0p PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1q0p RCSB], [http://www.ebi.ac.uk/pdbsum/1q0p PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1q0p ProSAT]</span></td></tr>
 </table>
 == Disease ==
@@ Line 32: / Line 32: @@
 </div>
 <div class="pdbe-citations 1q0p" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Complement factor 3D structures|Complement factor 3D structures]]
 == References ==
 <references/>
@@ Line 38: / Line 41: @@
 [[Category: Alternative-complement-pathway C3/C5 convertase]]
 [[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Bhattacharya, A A]]
 [[Category: Liddington, R C]]

1q0p

From Proteopedia

Revision as of 07:40, 9 December 2020

A domain of Factor B

Structural highlights

Disease

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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