Reviewed, UniProtKB/Swiss-Prot Q7NF35 (FABH_GLOVI)

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:	glr3692

Organism

Gloeobacter violaceus [Complete proteome] [HAMAP]

Taxonomic identifier

33072 [NCBI]

Taxonomic lineage

Bacteria › Cyanobacteria › Gloeobacteria › Gloeobacterales › Gloeobacter

Protein attributes

Sequence length	329 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: HAMAP
Cellular component	cytoplasm Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	3-oxoacyl-[acyl-carrier-protein] synthase activity Inferred from electronic annotation. Source: HAMAP 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 – 329	329	3-oxoacyl-[acyl-carrier-protein] synthase 3 HAMAP MF_01815		PRO_0000110430
Regions
	Region	254 – 258	5	ACP-binding By similarity
Sites
	Active site	112	1	By similarity
	Active site	253	1	By similarity
	Active site	283	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q7NF35-1 [UniParc]. Last modified December 15, 2003. Version 1. Checksum: 7805A7B31A8606CD	FASTA	329	34,696
	10 20 30 40 50 60 MPAVQMTGVG GAVPAQVLTN YHLSELVTTS DEWIASRTGI RSRRILAPGQ SLTQLAARAA 70 80 90 100 110 120 TDALSQAGRS PLDVDLLILA TSTPDDLFGG AAHLQHEIGA VRAVAFDLTA ACSGFVFALA 130 140 150 160 170 180 TASQFVRTGT YRTVLVVGAD ALSRYTDWTD RATCVLFGDG AGAALLEAGE VEGILGFELR 190 200 210 220 230 240 TDGARAGHLN IHCTAEAVPL AADMAATRAR FASITMNGRE VYRFAVEAVP DLIEKTLAAC 250 260 270 280 290 300 GVAPEQVKAY LLHQANQRIL DSVASRLHVA PERMASNLAD YGNTSSASVP LILQEWVQDG 310 320 RIRAGDRVVL AGFGAGLSWG VLLARWGRL

References

[1]

"Complete genome structure of Gloeobacter violaceus PCC 7421, a cyanobacterium that lacks thylakoids." Nakamura Y., Kaneko T., Sato S., Mimuro M., Miyashita H., Tsuchiya T., Sasamoto S., Watanabe A., Kawashima K., Kishida Y., Kiyokawa C., Kohara M., Matsumoto M., Matsuno A., Nakazaki N., Shimpo S., Takeuchi C., Yamada M., Tabata S. DNA Res. 10:137-145(2003) [PubMed: 14621292] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: PCC 7421.

Cross-references

Sequence databases
EMBL GenBank DDBJ	BA000045 Genomic DNA. Translation: BAC91633.1.
RefSeq	NP_926638.1.
3D structure databases
SMR	Q7NF35. Positions 6-328.
ModBase	Search...
Genome annotation databases
GeneID	2602096.
GenomeReviews	Gene locus glr3692 in contig BA000045_GR.
KEGG	gvi:glr3692.
NMPDR	fig|251221.1.peg.3692.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	HBG649927.
OMA	PVNISEY.
Enzyme and pathway databases
BioCyc	GVIO251221:GLR3692-MONOMER.
BRENDA	2.3.1.180. 276183.
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.
Pfam	PF08545. ACP_syn_III. 1 hit. PF08541. ACP_syn_III_C. 1 hit. [Graphical view]
TIGRFAMs	TIGR00747. fabH. 1 hit.
ProtoNet	Search...

Entry information

Entry name

FABH_GLOVI

Accession

Primary (citable) accession number: Q7NF35

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 26, 2004
Last sequence update:	December 15, 2003
Last modified:	February 9, 2010
This is version 47 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)