Reviewed, UniProtKB/Swiss-Prot Q6GBX5 (CYSK_STAAS)

Names and origin

Protein names

Recommended name:
    Cysteine synthase
      Short name=CSase
    EC=2.5.1.47
Alternative name(s):
    O-acetylserine sulfhydrylase
    O-acetylserine (thiol)-lyase
      Short name=OAS-TL

Gene names

Name:	cysK
Ordered Locus Names:	SAS0470

Organism

Staphylococcus aureus (strain MSSA476) [Complete proteome] [HAMAP]

Taxonomic identifier

282459 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Bacillales › Staphylococcus

Protein attributes

Sequence length	310 AA.
Sequence status	Complete.
Protein existence	Inferred from homology.

General annotation (Comments)

Catalytic activity	O(3)-acetyl-L-serine + H2S = L-cysteine + acetate.
Cofactor	Pyridoxal phosphate By similarity.
Pathway	Amino-acid biosynthesis; L-cysteine biosynthesis; L-cysteine from L-serine: step 2/2.
Subunit structure	Homodimer By similarity.
Sequence similarities	Belongs to the cysteine synthase/cystathionine beta-synthase family.

Ontologies

Keywords
Biological process	Amino-acid biosynthesis Cysteine biosynthesis
Ligand	Pyridoxal phosphate
Molecular function	Transferase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	cysteine biosynthetic process from serine Inferred from electronic annotation. Source: InterPro
Molecular function	cysteine synthase activity Inferred from electronic annotation. Source: EC pyridoxal phosphate binding Inferred from electronic annotation. Source: InterPro transferase activity Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 310	310	Cysteine synthase		PRO_0000167099
Regions
	Region	180 – 184	5	Pyridoxal phosphate binding By similarity
Sites
	Binding site	76	1	Pyridoxal phosphate By similarity
	Binding site	268	1	Pyridoxal phosphate By similarity
Amino acid modifications
	Modified residue	46	1	N6-(pyridoxal phosphate)lysine By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q6GBX5-1 [UniParc]. Last modified July 19, 2004. Version 1. Checksum: B881E3E85FF0DBC3	FASTA	310	32,976
	10 20 30 40 50 60 MAQKPVDNIT QIIGGTPVVK LRNVVDDNAA DVYVKLEYQN PGGSVKDRIA LAMIEKAERE 70 80 90 100 110 120 GKIKPGDTIV EPTSGNTGIG LAFVCAAKGY KAVFTMPETM SQERRNLLKA YGAELVLTPG 130 140 150 160 170 180 SEAMKGAIKK AKELKEEHGY FEPQQFENPA NPEVHELTTG PELLQQFEGK TIDAFLAGVG 190 200 210 220 230 240 TGGTLSGVGK VLKKEYPNIE IVAIEPEASP VLSGGEPGPH KLQGLGAGFI PGTLNTEIYD 250 260 270 280 290 300 SIIKVGNDTA MEMSRRVAKE EGILAGISSG AAIYAAIQKA KELGKGKTVV TVLPSNGERY 310 LSTPLYSFDD

References

[1]

"Complete genomes of two clinical Staphylococcus aureus strains: evidence for the rapid evolution of virulence and drug resistance." Holden M.T.G., Feil E.J., Lindsay J.A., Peacock S.J., Day N.P.J., Enright M.C., Foster T.J., Moore C.E., Hurst L., Atkin R., Barron A., Bason N., Bentley S.D., Chillingworth C., Chillingworth T., Churcher C., Clark L., Corton C. , Cronin A., Doggett J., Dowd L., Feltwell T., Hance Z., Harris B., Hauser H., Holroyd S., Jagels K., James K.D., Lennard N., Line A., Mayes R., Moule S., Mungall K., Ormond D., Quail M.A., Rabbinowitsch E., Rutherford K.M., Sanders M., Sharp S., Simmonds M., Stevens K., Whitehead S., Barrell B.G., Spratt B.G., Parkhill J. Proc. Natl. Acad. Sci. U.S.A. 101:9786-9791(2004) [PubMed: 15213324] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBL GenBank DDBJ	BX571857 Genomic DNA. Translation: CAG42245.1.
RefSeq	YP_042598.1.
3D structure databases
SMR	Q6GBX5. Positions 4-310.
ModBase	Search...
Protein-protein interaction databases
STRING	Q6GBX5.
Genome annotation databases
GeneID	2863348.
GenomeReviews	Gene locus SAS0470 in contig BX571857_GR.
KEGG	sas:SAS0470.
Organism-specific databases
CMR	Search...
Phylogenomic databases
eggNOG	COG0031.
HOGENOM	HBG748215.
OMA	TVIYAVE.
Enzyme and pathway databases
BioCyc	SAUR282459:SAS0470-MONOMER.
Family and domain databases
InterPro	IPR001216. Cys_synth_BS. IPR005856. Cys_synthKM. IPR005859. CysK. IPR001926. PyrdxlP-dep_enz_bsu. [Graphical view]
Pfam	PF00291. PALP. 1 hit. [Graphical view]
TIGRFAMs	TIGR01139. cysK. 1 hit. TIGR01136. cysKM. 1 hit.
PROSITE	PS00901. CYS_SYNTHASE. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

CYSK_STAAS

Accession

Primary (citable) accession number: Q6GBX5

Entry history

Integrated into UniProtKB/Swiss-Prot:	March 15, 2005
Last sequence update:	July 19, 2004
Last modified:	February 9, 2010
This is version 38 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)