P74564 (PSAK2_SYNY3) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Photosystem I reaction center subunit PsaK 2

Alternative name(s):
Photosystem I subunit X 2

Gene names

Name:	psaK2
Ordered Locus Names:	sll0629

Organism

Synechocystis sp. (strain PCC 6803 / Kazusa) [Reference proteome] [HAMAP]

Taxonomic identifier

1111708 [NCBI]

Taxonomic lineage

cellular organisms › Bacteria › Cyanobacteria › Oscillatoriophycideae › Chroococcales › Synechocystis › Synechocystis sp. PCC 6803

Protein attributes

Sequence length	90 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Inferred from homology

General annotation (Comments)

Subcellular location	Cellular thylakoid membrane; Multi-pass membrane protein By similarity HAMAP-Rule MF_00474.
Sequence similarities	Belongs to the PsaG/PsaK family.
Sequence caution	The sequence BAA18671.1 differs from that shown. Reason: Erroneous initiation. Translation N-terminally shortened.

Ontologies

Keywords
Biological process	Photosynthesis
Cellular component	Membrane Photosystem I Thylakoid
Domain	Transmembrane Transmembrane helix
Technical term	Complete proteome Reference proteome
Gene Ontology (GO)
Biological_process	photosynthesis Inferred from electronic annotation. Source: HAMAP
Cellular_component	integral to membrane Inferred from electronic annotation. Source: UniProtKB-KW photosystem I Inferred from electronic annotation. Source: UniProtKB-KW thylakoid membrane Inferred from electronic annotation. Source: UniProtKB-SubCell
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Propeptide	1 – ?		Potential		PRO_0000029410
	Chain	? – 90		Photosystem I reaction center subunit PsaK 2 HAMAP-Rule MF_00474		PRO_0000029411
Regions
	Transmembrane	20 – 42	23	Helical; Potential
	Transmembrane	67 – 89	23	Helical; Potential

Sequences

	Sequence		Length	Mass (Da)
	P74564 [UniParc]. Last modified August 2, 2002. Version 2. Checksum: 1D1C642D3D12589B	FASTA	90	9,306
	10 20 30 40 50 60 MFNTALLLAQ ASPTTAGWSL SVGIIMCLCN VFAFVIGYFA IQKTGKGKDL ALPQLASKKT 70 80 90 FGLPELLATM SFGHILGAGM VLGLASSGIL

References

[1]

"Sequence analysis of the genome of the unicellular cyanobacterium Synechocystis sp. strain PCC6803. II. Sequence determination of the entire genome and assignment of potential protein-coding regions." Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y., Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T., Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S. , Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S. DNA Res. 3:109-136(1996) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: PCC 6803 / Kazusa.

Cross-references

Sequence databases
EMBL GenBank DDBJ	BA000022 Genomic DNA. Translation: BAA18671.1. Different initiation.
PIR	S76759.
RefSeq	NP_442859.1. NC_000911.1. YP_007452735.1. NC_020286.1.
3D structure databases
ProteinModelPortal	P74564.
SMR	P74564. Positions 28-84.
ModBase	Search...
Protein-protein interaction databases
STRING	1148.sll0629.
Proteomic databases
PaxDb	P74564.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
EnsemblBacteria	BAA18671; BAA18671; BAA18671.
GeneID	14618420. 952137.
KEGG	syn:sll0629.
PATRIC	23843500. VBISynSp132158_3285.
Phylogenomic databases
eggNOG	NOG305738.
HOGENOM	HOG000232829.
KO	K02698.
OMA	FAIQKTG.
Enzyme and pathway databases
BioCyc	MetaCyc:MONOMER-16589.
Family and domain databases
HAMAP	MF_00474. PSI_PsaK.
InterPro	IPR000549. PSI_PsaG/PsaK. IPR017492. PSI_PsaK. [Graphical view]
Pfam	PF01241. PSI_PSAK. 1 hit. [Graphical view]
TIGRFAMs	TIGR03049. PS_I_psaK. 1 hit.
PROSITE	PS01026. PHOTOSYSTEM_I_PSAGK. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

PSAK2_SYNY3

Accession

Primary (citable) accession number: P74564

Entry history

Integrated into UniProtKB/Swiss-Prot:	August 2, 2002
Last sequence update:	August 2, 2002
Last modified:	May 1, 2013
This is version 83 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program