Accession	MF_01569
Dates	18-AUG-2006 (Created) 7-JUN-2008 (Last updated, Version 8)

Data class

Protein

Predictors

HAMAP; MF_01569; [distribution of match scores in UniProtKB];[seed alignment for MF_01569]

Identifier

SYP

Protein name

RecName: Full=Prolyl-tRNA synthetase; EC=6.1.1.15; AltName: Full=Proline--tRNA ligase; Short=ProRS;

Gene name

proS

FUNCTION: Catalyzes the attachment of proline to tRNA(Pro) in a two-step reaction: proline is first activated by ATP to form Pro-AMP and then transferred to the acceptor end of tRNA(Pro). As ProRS can inadvertently accommodate and process non-cognate amino acids such as alanine and cysteine, to avoid such errors it has two additional distinct editing activities against alanine. One activity is designated as 'pretransfer' editing and involves the tRNA(Pro)-independent hydrolysis of activated Ala-AMP. The other activity is designated 'posttransfer' editing and involves deacylation of mischarged Ala-tRNA(Pro). The misacylated Cys-tRNA(Pro) is not edited by ProRS (By similarity).

CATALYTIC ACTIVITY: ATP + L-proline + tRNA(Pro) = AMP + diphosphate + L-prolyl-tRNA(Pro).

SUBUNIT: Homodimer (By similarity).

SUBCELLULAR LOCATION: Cytoplasm (By similarity).

DOMAIN: Consists of three domains: the N-terminal catalytic domain, the editing domain and the C-terminal anticodon-binding domain (By similarity).

SIMILARITY: Belongs to the class-II aminoacyl-tRNA synthetase family. ProS type 1 subfamily.

PROSITE	PS50862; AA_TRNA_LIGASE_II; 1;
Pfam	PF03129; HGTP_anticodon; 1; PF00587; tRNA-synt_2b; 1; PF04073; YbaK; 1;
PRINTS	PR01046; TRNASYNTHPRO; 1;
TIGRFAMs	TIGR00409; proS_fam_II; 1;

Cytoplasm, Aminoacyl-tRNA synthetase, ATP-binding, Ligase, Nucleotide-binding, Protein biosynthesis.

GO:0005524; Molecular function: ATP binding.
GO:0004827; Molecular function: proline-tRNA ligase activity.
GO:0006433; Biological process: prolyl-tRNA aminoacylation.
GO:0005737; Cellular component: cytoplasm.

Size range:	557-620 amino acids
Related UniRules:	MF_01570 (SYP); MF_01571 (SYP)
Template:	P16659 (SYP_ECOLI); O66690 (SYP_AQUAE): [Recover all]
Scope:	Bacteria
Fusion:	Nter: None; Cter: None
Duplicate:	None
Plasmid encoded:	None
Comments:	Some species have a second copy of proS in another subfamily (MF_01571).