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Descriptor English: Complement Factor I
Descriptor Spanish: Factor I de Complemento
Descriptor Portuguese: Fator I do Complemento
Descriptor French: Facteur I du complément
Entry term(s): C3b C4b Inactivator
C3b Inactivator
C3b-C4b Inactivator
C4b C3b INA
C4b-C3b Inactivator, Complement
C4b-C3b-INA
C4bC3bINA
Complement 3b Complement 4b Inactivator
Complement 3b-Complement 4b Inactivator
Complement C4b C3b Inactivator
Complement C4b-C3b Inactivator
Inactivator, C3b
Inactivator, C3b-C4b
Inactivator, Complement C4b-C3b
Tree number(s): D08.811.277.656.300.760.210
D08.811.277.656.959.350.210
D12.776.124.486.274.920.325.210
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D017244
Scope note: A plasma serine proteinase that cleaves the alpha-chains of C3b and C4b in the presence of the cofactors COMPLEMENT FACTOR H and C4-binding protein, respectively. It is a 66-kDa glycoprotein that converts C3b to inactivated C3b (iC3b) followed by the release of two fragments, C3c (150-kDa) and C3dg (41-kDa). It was formerly called KAF, C3bINF, or enzyme 3b inactivator.
Annotation: do not confuse with FACTOR I see FIBRINOGEN
Allowable Qualifiers: AD administration & dosage
AE adverse effects
AG agonists
AI antagonists & inhibitors
AN analysis
BI biosynthesis
CF cerebrospinal fluid
CH chemistry
CL classification
CS chemical synthesis
DE drug effects
DF deficiency
EC economics
GE genetics
HI history
IM immunology
IP isolation & purification
ME metabolism
PD pharmacology
PH physiology
PK pharmacokinetics
PO poisoning
RE radiation effects
SD supply & distribution
ST standards
TO toxicity
TU therapeutic use
UL ultrastructure
UR urine
Pharm Action: Complement Inactivating Agents
Registry Number: EC 3.4.21.45
Previous Indexing: Peptide Peptidohydrolases (1983-1987)
Serine Proteinases (1988-1992)
Public MeSH Note: 93; COMPLEMENT FACTOR I was indexed under SERINE PROTEINASES 1988-92 & under PEPTIDE PEPTIDOHYDROLASES 1983-87
Online Note: use COMPLEMENT FACTOR I (NM) to search FACTOR I, C 3B INACTIVATOR 1983-92
History Note: 93; was FACTOR I, C 3B INACTIVATOR (NM) 1983-92
DeCS ID: 30774
Unique ID: D017244
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 1993/01/01
Date of Entry: 1992/05/07
Revision Date: 2009/07/06
Complement Factor I - Preferred
Concept UI M0026165
Scope note A plasma serine proteinase that cleaves the alpha-chains of C3b and C4b in the presence of the cofactors COMPLEMENT FACTOR H and C4-binding protein, respectively. It is a 66-kDa glycoprotein that converts C3b to inactivated C3b (iC3b) followed by the release of two fragments, C3c (150-kDa) and C3dg (41-kDa). It was formerly called KAF, C3bINF, or enzyme 3b inactivator.
Preferred term Complement Factor I
Entry term(s) C3b C4b Inactivator
C3b Inactivator
C3b-C4b Inactivator
C4b C3b INA
C4b-C3b Inactivator, Complement
C4b-C3b-INA
C4bC3bINA
Complement 3b Complement 4b Inactivator
Complement 3b-Complement 4b Inactivator
Complement C4b C3b Inactivator
Complement C4b-C3b Inactivator
Inactivator, C3b
Inactivator, C3b-C4b
Inactivator, Complement C4b-C3b



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