Q8R9V7 (FABH_THETN) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
3-oxoacyl-[acyl-carrier-protein] synthase 3
EC=2.3.1.180

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:	TTE1475

Organism

Thermoanaerobacter tengcongensis (strain DSM 15242 / JCM 11007 / NBRC 100824 / MB4) (Caldanaerobacter subterraneus subsp. tengcongensis) [Complete proteome] [HAMAP]

Taxonomic identifier

273068 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Clostridia › Thermoanaerobacterales › Thermoanaerobacteriaceae › Caldanaerobacter

Protein attributes

Sequence length	331 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	Acetyl-CoA + malonyl-[acyl-carrier-protein] = acetoacetyl-[acyl-carrier-protein] + CoA + CO2. 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: InterPro beta-ketoacyl-acyl-carrier-protein synthase III 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 – 331	331	3-oxoacyl-[acyl-carrier-protein] synthase 3 HAMAP MF_01815		PRO_0000110499
Regions
	Region	257 – 261	5	ACP-binding By similarity
Sites
	Active site	116	1	By similarity
	Active site	256	1	By similarity
	Active site	286	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q8R9V7 [UniParc]. Last modified June 1, 2002. Version 1. Checksum: D2E2597DE658DDA8	FASTA	331	35,679
	10 20 30 40 50 60 MCEKIAAGIL GTGSYLPEKI LTNFDLEKMV DTSDEWITTR TGIKERRIAD PSQATSDLAT 70 80 90 100 110 120 EASKRALEDA NLKPEDLDMI IVATVTPDMN FPSTACIVQA NLGALNAAAF DISVGCSGFI 130 140 150 160 170 180 YGLAIAQQFV ETGMYRNVLV IGAETLSKII NWKDRNTCVL FGDGAGAAVV GRVESGYGIL 190 200 210 220 230 240 GSYLGADGTG GKYLYMPAGG SRMPASHETV EKNLHTIFME GQEVFKFAVK VMDSATIEVL 250 260 270 280 290 300 ERCGLTPEDI DMLIPHQANT RIIEAARKRL KLTNDKVYIN LDKYGNTSAA SVAIALDEAY 310 320 330 RKGLIKKGDI ILTVAFGAGL TWASSVIKWS K

References

[1]	"A complete sequence of the T. tengcongensis genome." Bao Q., Tian Y., Li W., Xu Z., Xuan Z., Hu S., Dong W., Yang J., Chen Y., Xue Y., Xu Y., Lai X., Huang L., Dong X., Ma Y., Ling L., Tan H., Chen R. , Wang J., Yu J., Yang H. Genome Res. 12:689-700(2002) [PubMed: 11997336] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: DSM 15242 / JCM 11007 / NBRC 100824 / MB4.
+	Additional computationally mapped references.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AE008691 Genomic DNA. Translation: AAM24697.1.
RefSeq	NP_623093.1. NC_003869.1.
3D structure databases
ProteinModelPortal	Q8R9V7.
SMR	Q8R9V7. Positions 7-330.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	997567.
GenomeReviews	Gene locus TTE1475 in contig AE008691_GR.
KEGG	tte:TTE1475.
NMPDR	fig|273068.3.peg.1440.
PATRIC	23897662. VBITheTen82880_1484.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	HBG649927.
OMA	HTIFMEG.
ProtClustDB	PRK09352.
Enzyme and pathway databases
BioCyc	TTEN273068:TTE1475-MONOMER.
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_THETN

Accession

Primary (citable) accession number: Q8R9V7

Entry history

Integrated into UniProtKB/Swiss-Prot:	August 15, 2003
Last sequence update:	June 1, 2002
Last modified:	January 25, 2012
This is version 63 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program