Reviewed, UniProtKB/Swiss-Prot P81340 (CYSK_CLOPA)

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
    CP 27

Gene names

Name:

cysK

Organism

Clostridium pasteurianum

Taxonomic identifier

1501 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Clostridia › Clostridiales › Clostridiaceae › Clostridium

Protein attributes

Sequence length	15 AA.
Sequence status	Fragment.
Protein existence	Evidence at protein level.

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	Direct protein sequencing
Gene Ontology (GO)
Biological process	cysteine biosynthetic process Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	cysteine synthase activity Inferred from electronic annotation. Source: EC 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 – ›15	›15	Cysteine synthase		PRO_0000167085
Experimental info
	Non-terminal residue	15	1

Sequences

	Sequence		Length	Mass (Da)
	P81340-1 [UniParc]. Last modified July 15, 1998. Version 1. Checksum: 0196582B9671A352	FASTA	15	1,625
	10 NVTELIGNTP LVELI

References

[1]

"Two-dimensional gel electrophoresis separation and N-terminal sequence analysis of proteins from Clostridium pasteurianum W5." Flengsrud R., Skjeldal L. Electrophoresis 19:802-806(1998) [PubMed: 9629918] [Abstract] Cited for: PROTEIN SEQUENCE. Strain: ATCC 6013 / DSM 525 / NCIB 9486 / VKM B-1774 / W5.

Cross-references

3D structure databases
ModBase	Search...
Enzyme and pathway databases
BRENDA	2.5.1.47. 871.
Family and domain databases
PROSITE	PS00901. CYS_SYNTHASE. Partial match. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

CYSK_CLOPA

Accession

Primary (citable) accession number: P81340

Entry history

Integrated into UniProtKB/Swiss-Prot:	July 15, 1998
Last sequence update:	July 15, 1998
Last modified:	November 24, 2009
This is version 43 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)