Reviewed, UniProtKB/Swiss-Prot P68795 (FABH_STAAM)

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
    SaFabH

Gene names

Name:	fabH
Ordered Locus Names:	SAV0983

Organism

Staphylococcus aureus (strain Mu50 / ATCC 700699) [Complete proteome] [HAMAP]

Taxonomic identifier

158878 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Bacillales › Staphylococcus

Protein attributes

Sequence length	313 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at protein level.

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. Has some substrate preference for butyryl- and isobutyryl-CoA. Its substrate specificity determines the biosynthesis of branched-chain of fatty acids. Ref.2
Catalytic activity	Acetyl-CoA + malonyl-[acyl-carrier-protein] = acetoacyl-[acyl-carrier-protein] + CoA + CO2. HAMAP MF_01815
Pathway	Lipid metabolism; fatty acid biosynthesis. HAMAP MF_01815
Subunit structure	Homodimer. Ref.2
Subcellular location	Cytoplasm Probable.
Domain	The last Arg residue of the ACP-binding site is essential for the weak association between ACP/acpP and fabH By similarity.
Miscellaneous	Inhibited by the HR12 (5-chloro-4-phenyl-[1,2]-dithiol-3-one) and HR19 (4-phenyl-5-phenylimino-[1,2,4]dithiazolidin-3-one) antibiotics. Weakly inhibited by thiolactomycin. 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 – 313	313	3-oxoacyl-[acyl-carrier-protein] synthase 3 HAMAP MF_01815		PRO_0000110469
Regions
	Region	239 – 243	5	ACP-binding By similarity
Sites
	Active site	112	1	By similarity
	Active site	238	1	By similarity
	Active site	268	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	P68795-1 [UniParc]. Last modified December 21, 2004. Version 1. Checksum: 728D2DCCAB9B95F7	FASTA	313	33,879
	10 20 30 40 50 60 MNVGIKGFGA YAPEKIIDNA YFEQFLDTSD EWISKMTGIK ERHWADDDQD TSDLAYEASV 70 80 90 100 110 120 KAIADAGIQP EDIDMIIVAT ATGDMPFPTV ANMLQERLGT GKVASMDQLA ACSGFMYSMI 130 140 150 160 170 180 TAKQYVQSGD YHNILVVGAD KLSKITDLTD RSTAVLFGDG AGAVIIGEVS EGRGIISYEM 190 200 210 220 230 240 GSDGTGGKHL YLDKDTGKLK MNGREVFKFA VRIMGDASTR VVEKANLTSD DIDLFIPHQA 250 260 270 280 290 300 NIRIMESARE RLGISKDKMS VSVNKYGNTS AASIPLSIDQ ELKNGKLKDD DTIVLVGFGG 310 GLTWGAMTIK WGK

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Whole genome sequencing of meticillin-resistant Staphylococcus aureus." Kuroda M., Ohta T., Uchiyama I., Baba T., Yuzawa H., Kobayashi I., Cui L., Oguchi A., Aoki K., Nagai Y., Lian J.-Q., Ito T., Kanamori M., Matsumaru H., Maruyama A., Murakami H., Hosoyama A., Mizutani-Ui Y. , Takahashi N.K., Sawano T., Inoue R., Kaito C., Sekimizu K., Hirakawa H., Kuhara S., Goto S., Yabuzaki J., Kanehisa M., Yamashita A., Oshima K., Furuya K., Yoshino C., Shiba T., Hattori M., Ogasawara N., Hayashi H., Hiramatsu K. Lancet 357:1225-1240(2001) [PubMed: 11418146] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
[2]	"Purification, characterization, and identification of novel inhibitors of the beta-ketoacyl-acyl carrier protein synthase III (FabH) from Staphylococcus aureus." He X., Reynolds K.A. Antimicrob. Agents Chemother. 46:1310-1318(2002) [PubMed: 11959561] [Abstract] Cited for: FUNCTION, HOMODIMERIZATION, SUBSTRATE SPECIFICITY.

Cross-references

Sequence databases
EMBLGenBankDDBJ	BA000017 Genomic DNA. Translation: BAB57145.1.
RefSeq	NP_371507.1.
3D structure databases
HSSP	HSSP built from PDB template 1HNK based on UniProtKB P24249.
SMR	P68795. Positions 1-312.
ModBase	Search...
Protein-protein interaction databases
STRING	P68795.
2-D gel databases
World-2DPAGE	0002:P68795.
Genome annotation databases
GeneID	1120958.
GenomeReviews	Gene locus SAV0983 in contig BA000017_GR.
KEGG	sav:SAV0983.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	P68795.
OMA	YIVPHQA.
Enzyme and pathway databases
BioCyc	SAUR158878:SAV0983-MON.
Family and domain databases
HAMAP	MF_01815. [Tree]
InterPro	IPR013751. ACP_syn_III. IPR013747. ACP_syn_III_C. IPR004655. FabH_synth. 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_STAAM

Accession

Primary (citable) accession number: P68795
Secondary accession number(s): Q99VA7

Entry history

Integrated into UniProtKB/Swiss-Prot:	December 21, 2004
Last sequence update:	December 21, 2004
Last modified:	November 3, 2009
This is version 37 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)