Q55330 (PSAI_SYNY3) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Photosystem I reaction center subunit VIII

Gene names

Name:	psaI
Ordered Locus Names:	smr0004

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	40 AA.
Sequence status	Complete.
Protein existence	Inferred from homology

General annotation (Comments)

Function	May help in the organization of the PsaL subunit. HAMAP-Rule MF_00431
Subcellular location	Cellular thylakoid membrane; Single-pass membrane protein By similarity HAMAP-Rule MF_00431.
Sequence similarities	Belongs to the PsaI family.

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
	Chain	1 – 40	40	Photosystem I reaction center subunit VIII HAMAP-Rule MF_00431		PRO_0000194685
Regions
	Transmembrane	12 – 32	21	Helical; Potential

Sequences

	Sequence		Length	Mass (Da)
	Q55330 [UniParc]. Last modified November 1, 1996. Version 1. Checksum: DAD8CA06B0420372	FASTA	40	4,413
	10 20 30 40 MDGSYAASYL PWILIPMVGW LFPAVTMGLL FIHIESEGEG

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Mutational analysis of photosystem I polypeptides in the cyanobacterium Synechocystis sp. PCC 6803. Targeted inactivation of psaI reveals the function of psaI in the structural organization of psaL." Xu Q., Hoppe D., Chitnis V.P., Odom W.R., Guikema J.A., Chitnis P.R. J. Biol. Chem. 270:16243-16250(1995) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]	"Targeted inactivation of the gene psaI encoding a subunit of photosystem I of the cyanobacterium Synechocystis sp. PCC 6803." Nakamoto H. Plant Cell Physiol. 36:1579-1587(1995) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[3]	"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.
+	Additional computationally mapped references.

Cross-references

Sequence databases
EMBL GenBank DDBJ	L24773 Genomic DNA. Translation: AAA99435.1. D38131 Genomic DNA. Translation: BAA19609.1. BA000022 Genomic DNA. Translation: BAA18774.1.
PIR	A57482.
RefSeq	NP_442962.1. NC_000911.1. YP_005653021.1. NC_017277.1. YP_007452837.1. NC_020286.1.
3D structure databases
ProteinModelPortal	Q55330.
SMR	Q55330. Positions 1-38.
ModBase	Search...
Protein-protein interaction databases
IntAct	Q55330. 3 interactions.
STRING	1148.smr0004.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
EnsemblBacteria	BAA18774; BAA18774; BAA18774.
GeneID	12255472. 14618529. 952043.
KEGG	syn:smr0004. syy:SYNGTS_3068.
PATRIC	23843750. VBISynSp132158_3405.
Phylogenomic databases
eggNOG	NOG81103.
HOGENOM	HOG000246917.
KO	K02696.
ProtClustDB	PRK11877.
Enzyme and pathway databases
BioCyc	MetaCyc:PSAI-MONOMER.
Family and domain databases
HAMAP	MF_00431. PSI_PsaI.
InterPro	IPR001302. PSI_PsaI. [Graphical view]
Pfam	PF00796. PSI_8. 1 hit. [Graphical view]
ProDom	PD003995. PSI_su8. 1 hit. [Graphical view] [Entries sharing at least one domain]
SUPFAM	SSF81540. PSI_su8. 1 hit.
TIGRFAMs	TIGR03052. PS_I_psaI. 1 hit.
ProtoNet	Search...

Entry information

Entry name

PSAI_SYNY3

Accession

Primary (citable) accession number: Q55330

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 1, 1997
Last sequence update:	November 1, 1996
Last modified:	May 1, 2013
This is version 81 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program