Reviewed, UniProtKB/Swiss-Prot Q8XEA7 (SERC_ECO57)

Names and origin

Protein names

Recommended name:
    Phosphoserine aminotransferase
    EC=2.6.1.52
Alternative name(s):
    Phosphohydroxythreonine aminotransferase
      Short name=PSAT

Gene names

Name:	serC
Ordered Locus Names:	Z1253, ECs0990

Organism

Escherichia coli O157:H7 [Complete proteome] [HAMAP]

Taxonomic identifier

83334 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Escherichia

Protein attributes

Sequence length	362 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Catalyzes the reversible conversion of 3-phosphohydroxypyruvate to phosphoserine and of 3-hydroxy-2-oxo-4-phosphonooxybutanoate to phosphohydroxythreonine By similarity.
Catalytic activity	O-phospho-L-serine + 2-oxoglutarate = 3-phosphonooxypyruvate + L-glutamate. HAMAP MF_00160 4-phosphonooxy-L-threonine + 2-oxoglutarate = (3R)-3-hydroxy-2-oxo-4-phosphonooxybutanoate + L-glutamate. HAMAP MF_00160
Cofactor	Binds 1 pyridoxal phosphate per subunit By similarity.
Pathway	Amino-acid biosynthesis; L-serine biosynthesis; L-serine from 3-phospho-D-glycerate: step 2/3. HAMAP MF_00160 Cofactor biosynthesis; pyridoxine 5'-phosphate biosynthesis; pyridoxine 5'-phosphate from D-erythrose 4-phosphate: step 3/5. HAMAP MF_00160
Subunit structure	Homodimer By similarity.
Subcellular location	Cytoplasm By similarity.
Sequence similarities	Belongs to the class-V pyridoxal-phosphate-dependent aminotransferase family. SerC subfamily.

Ontologies

Keywords
Biological process	Amino-acid biosynthesis Pyridoxine biosynthesis Serine biosynthesis
Cellular component	Cytoplasm
Ligand	Pyridoxal phosphate
Molecular function	Aminotransferase Transferase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	L-serine biosynthetic process Inferred from electronic annotation. Source: HAMAP pyridoxine biosynthetic process Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	cytoplasm Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	O-phospho-L-serine:2-oxoglutarate aminotransferase activity Inferred from electronic annotation. Source: HAMAP pyridoxal phosphate binding Inferred from electronic annotation. Source: HAMAP
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Initiator methionine	1	1	Removed By similarity
	Chain	2 – 362	361	Phosphoserine aminotransferase HAMAP MF_00160		PRO_0000150168
Regions
	Region	76 – 77	2	Pyridoxal phosphate binding By similarity
	Region	239 – 240	2	Pyridoxal phosphate binding By similarity
Sites
	Binding site	9	1	L-glutamate By similarity
	Binding site	42	1	L-glutamate By similarity
	Binding site	102	1	Pyridoxal phosphate By similarity
	Binding site	153	1	Pyridoxal phosphate By similarity
	Binding site	174	1	Pyridoxal phosphate By similarity
	Binding site	197	1	Pyridoxal phosphate By similarity
Amino acid modifications
	Modified residue	198	1	N6-(pyridoxal phosphate)lysine By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q8XEA7-1 [UniParc]. Last modified January 23, 2007. Version 3. Checksum: 94CB65EBB4D05A05	FASTA	362	39,854
	10 20 30 40 50 60 MAQIFNFSSG PAMLPVEVLK QAQQELRDWN GLGTSVMEVS HRGKEFIQVA EEAEKDFRDL 70 80 90 100 110 120 LNVPSNYKVL FCHGGGRGQF AAVPLNILGD KTTADYVDAG YWAASAIKEA KKYCTPNVFD 130 140 150 160 170 180 AKVTVDGLRA VKPMREWQLS DNAAYMHYCP NETIDGIAID ETPDFGKDVV VAADFSSTIL 190 200 210 220 230 240 SRPIDVSRYG VIYAGAQKNI GPAGLTIVIV REDLLGKANV ACPSILDYSI LNDNGSMFNT 250 260 270 280 290 300 PPTFAWYLSG LVFKWLKANG GVAEMDKINQ QKAELLYGVI DNSDFYRNDV AKANRSRMNV 310 320 330 340 350 360 PFQLADSALD KLFLEESFAA GLHALKGHRV VGGMRASIYN AMPLEGVKAL TDFMVEFERR HG

References

[1]

"Genome sequence of enterohaemorrhagic Escherichia coli O157:H7." Perna N.T., Plunkett G. III, Burland V., Mau B., Glasner J.D., Rose D.J., Mayhew G.F., Evans P.S., Gregor J., Kirkpatrick H.A., Posfai G., Hackett J., Klink S., Boutin A., Shao Y., Miller L., Grotbeck E.J., Davis N.W. , Lim A., Dimalanta E.T., Potamousis K., Apodaca J., Anantharaman T.S., Lin J., Yen G., Schwartz D.C., Welch R.A., Blattner F.R. Nature 409:529-533(2001) [PubMed: 11206551] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: O157:H7 / EDL933 / ATCC 700927 / EHEC.

[2]

"Complete genome sequence of enterohemorrhagic Escherichia coli O157:H7 and genomic comparison with a laboratory strain K-12." Hayashi T., Makino K., Ohnishi M., Kurokawa K., Ishii K., Yokoyama K., Han C.-G., Ohtsubo E., Nakayama K., Murata T., Tanaka M., Tobe T., Iida T., Takami H., Honda T., Sasakawa C., Ogasawara N., Yasunaga T. , Kuhara S., Shiba T., Hattori M., Shinagawa H. DNA Res. 8:11-22(2001) [PubMed: 11258796] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: O157:H7 / Sakai / RIMD 0509952 / EHEC.

Cross-references

Sequence databases
EMBLGenBankDDBJ	AE005174 Genomic DNA. Translation: AAG55392.1. BA000007 Genomic DNA. Translation: BAB34413.1.
PIR	D85616. F90752.
RefSeq	NP_286782.1. NP_309017.1.
3D structure databases
HSSP	HSSP built from PDB template 1BJN based on UniProtKB P23721.
SMR	Q8XEA7. Positions 3-362.
ModBase	Search...
Genome annotation databases
GeneID	917733. 958869.
GenomeReviews	Gene locus Z1253 in contig AE005174_GR. Gene locus ECs0990 in contig BA000007_GR.
KEGG	ece:Z1253. ecs:ECs0990.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q8XEA7.
OMA	SMYNTPP.
Enzyme and pathway databases
BioCyc	ECOL83334:ECS0990-MON.
Family and domain databases
HAMAP	MF_00160. [Tree]
InterPro	IPR000192. Aminotrans_V/Cys_dSase. IPR020578. Aminotrans_V_PyrdxlP_BS. IPR003248. Pser_amintransf. IPR015421. PyrdxlP-dep_Trfase_major_sub1. IPR015422. PyrdxlP-dep_Trfase_major_sub2. [Graphical view]
Gene3D	G3DSA:3.40.640.10. PyrdxlP-dep_Trfase_major_sub1. 1 hit. G3DSA:3.90.1150.10. PyrdxlP-dep_Trfase_major_sub2. 1 hit.
Pfam	PF00266. Aminotran_5. 1 hit. [Graphical view]
ProDom	PD001544. Pser_amintransf. 1 hit. [Graphical view] [Entries sharing at least one domain]
TIGRFAMs	TIGR01364. serC_1. 1 hit.
PROSITE	PS00595. AA_TRANSFER_CLASS_5. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

SERC_ECO57

Accession

Primary (citable) accession number: Q8XEA7

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 4, 2003
Last sequence update:	January 23, 2007
Last modified:	November 3, 2009
This is version 57 of the entry and version 3 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

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