A8AHY1 (FABH_CITK8) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
3-oxoacyl-[acyl-carrier-protein] synthase 3
EC=2.3.1.41

Alternative name(s):
3-oxoacyl-[acyl-carrier-protein] synthase III
Beta-ketoacyl-ACP synthase III
Short name=KAS III

Gene names

Name:	fabH
Ordered Locus Names:	CKO_01967

Organism

Citrobacter koseri (strain ATCC BAA-895 / CDC 4225-83 / SGSC4696) [Complete proteome] [HAMAP]

Taxonomic identifier

290338 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Citrobacter

Protein attributes

Sequence length	317 AA.
Sequence status	Complete.
Protein existence	Inferred from homology

General annotation (Comments)

Function	Catalyzes the condensation reaction of fatty acid synthesis by the addition to an acyl acceptor of two carbons from malonyl-ACP. Catalyzes the first condensation reaction which initiates fatty acid synthesis and may therefore play a role in governing the total rate of fatty acid production. Possesses both acetoacetyl-ACP synthase and acetyl transacylase activities. Its substrate specificity determines the biosynthesis of branched-chain and/or straight-chain of fatty acids By similarity. HAMAP MF_01815
Catalytic activity	Acyl-[acyl-carrier-protein] + malonyl-[acyl-carrier-protein] = 3-oxoacyl-[acyl-carrier-protein] + CO2 + [acyl-carrier-protein]. HAMAP MF_01815
Pathway	Lipid metabolism; fatty acid biosynthesis. HAMAP MF_01815
Subunit structure	Homodimer By similarity. HAMAP MF_01815
Subcellular location	Cytoplasm Probable HAMAP MF_01815.
Domain	The last Arg residue of the ACP-binding site is essential for the weak association between ACP/AcpP and FabH By similarity. HAMAP MF_01815
Sequence similarities	Belongs to the FabH family.

Ontologies

Keywords
Biological process	Fatty acid biosynthesis Lipid synthesis
Cellular component	Cytoplasm
Molecular function	Acyltransferase Transferase
Technical term	Complete proteome Multifunctional enzyme
Gene Ontology (GO)
Biological process	fatty acid biosynthetic process Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	cytoplasm Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	3-oxoacyl-[acyl-carrier-protein] synthase activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 317	317	3-oxoacyl-[acyl-carrier-protein] synthase 3 HAMAP MF_01815		PRO_1000056342
Regions
	Region	245 – 249	5	ACP-binding By similarity
Sites
	Active site	112	1	By similarity
	Active site	244	1	By similarity
	Active site	274	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	A8AHY1 [UniParc]. Last modified October 23, 2007. Version 1. Checksum: 9611ACC417033C1A	FASTA	317	33,483
	10 20 30 40 50 60 MYTKIIGTGS YLPEQVRTNA DLEKMVETSD EWIVTRTGIR ERHIAAPNET VATMGYTAAN 70 80 90 100 110 120 RALEMAGIDK DQIGLIVVAT TSATHAFPSA ACQIQSMLGI KGCPAFDVAA ACAGFTYALS 130 140 150 160 170 180 VADQYVKSGA VKYALVIGSD VLARTCDPTD RGTIIIFGDG AGAAVLSASE EPGIISTHLH 190 200 210 220 230 240 ADGSYGELLT LPNADRVNPE NPIYLTMAGN EVFKVAVTEL AHIVDETLAA NNLDRSALDW 250 260 270 280 290 300 LVPHQANLRI ISATAKKLGM SMDNVVVTLD RHGNTSAASV PCALDEAVRD GRIKAGQLVL 310 LEAFGGGFTW GSALVRF

References

[1]

The Citrobacter koseri Genome Sequencing Project McClelland M., Sanderson E.K., Porwollik S., Spieth J., Clifton W.S., Latreille P., Courtney L., Wang C., Pepin K., Bhonagiri V., Nash W., Johnson M., Thiruvilangam P., Wilson R. Submitted (AUG-2007) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC BAA-895 / CDC 4225-83 / SGSC4696.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP000822 Genomic DNA. Translation: ABV13094.1.
RefSeq	YP_001453530.1. NC_009792.1.
3D structure databases
ProteinModelPortal	A8AHY1.
SMR	A8AHY1. Positions 1-317.
ModBase	Search...
Protein-protein interaction databases
STRING	A8AHY1.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	5583404.
GenomeReviews	Gene locus CKO_01967 in contig CP000822_GR.
KEGG	cko:CKO_01967.
PATRIC	20386859. VBICitKos71230_1645.
Organism-specific databases
CMR	Search...
Phylogenomic databases
eggNOG	COG0332.
HOGENOM	HBG649927.
OMA	RILNFLA.
ProtClustDB	PRK09352.
Family and domain databases
HAMAP	MF_01815. FabH. [Tree]
InterPro	IPR013751. ACP_syn_III. IPR013747. ACP_syn_III_C. IPR004655. FabH_synth. IPR016039. Thiolase-like. IPR016038. Thiolase-like_subgr. [Graphical view]
Gene3D	G3DSA:3.40.47.10. Thiolase-like_subgr. 2 hits.
KO	K00648.
Pfam	PF08545. ACP_syn_III. 1 hit. PF08541. ACP_syn_III_C. 1 hit. [Graphical view]
SUPFAM	SSF53901. Thiolase-like. 1 hit.
TIGRFAMs	TIGR00747. FabH. 1 hit.
ProtoNet	Search...

Entry information

Entry name

FABH_CITK8

Accession

Primary (citable) accession number: A8AHY1

Entry history

Integrated into UniProtKB/Swiss-Prot:	January 15, 2008
Last sequence update:	October 23, 2007
Last modified:	January 25, 2012
This is version 28 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program