P0A421 (PSAD_SYNEL) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Photosystem I reaction center subunit II

Alternative name(s):
Photosystem I 16 kDa polypeptide
Short name=PSI-D

Gene names

Name:

psaD

Organism

Synechococcus elongatus

Taxonomic identifier

32046 [NCBI]

Taxonomic lineage

cellular organisms › Bacteria › Cyanobacteria › Oscillatoriophycideae › Chroococcales › Synechococcus

Protein attributes

Sequence length	139 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Evidence at protein level

General annotation (Comments)

Function	PsaD can form complexes with ferredoxin and ferredoxin-oxidoreductase in photosystem I (PS I) reaction center.
Sequence similarities	Belongs to the PsaD family.

Ontologies

Keywords
Biological process	Photosynthesis
Cellular component	Photosystem I
Technical term	Direct protein sequencing
Gene Ontology (GO)
Biological_process	photosynthesis Inferred from electronic annotation. Source: UniProtKB-KW
Cellular_component	photosystem I reaction center Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Initiator methionine	1	1	Removed Ref.2 Ref.3
	Chain	2 – 139	138	Photosystem I reaction center subunit II		PRO_0000206055
Experimental info
	Sequence conflict	132	1	T → P AA sequence Ref.2

Sequences

	Sequence		Length	Mass (Da)
	P0A421 [UniParc]. Last modified January 23, 2007. Version 2. Checksum: 7073427556CF26F9	FASTA	139	15,371
	10 20 30 40 50 60 MTTLTGQPPL YGGSTGGLLS AADTEEKYAI TWTSPKEQVF EMPTAGAAVM REGENLVYFA 70 80 90 100 110 120 RKEQCLALAA QQLRPRKIND YKIYRIFPDG ETVLIHPKDG VFPEKVNKGR EAVNSVPRSI 130 GQNPNPSQLK FTGKKPYDP

References

[1]	"Genes encoding eleven subunits of photosystem I from the thermophilic cyanobacterium Synechococcus sp." Muehlenhoff U., Haehnel W., Witt H.T., Herrmann R.G. Gene 127:71-78(1993) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]	"Amino acid sequence of the 14-kDa protein in the photosystem I reaction center complex from Synechococcus elongatus naegeli." Kotani N., Enami I., Aso K., Tsugita A. Protein Seq. Data Anal. 4:81-86(1991) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 2-138.
[3]	"N-terminal amino acid sequence analysis of small subunits of photosystem I reaction center complex from a thermophilic cyanobacterium, Synechococcus elongatus nageli." Enami I., Kaiho H., Izumi H., Katoh S., Kotani N., Jone C.S., Kamo M., Tsugita A. Protein Seq. Data Anal. 3:257-262(1990) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 2-62.

Cross-references

Sequence databases
EMBL GenBank DDBJ	X63769 Genomic DNA. Translation: CAA45306.1.
PIR	A35567. S17529.
3D structure databases
ProteinModelPortal	P0A421.
SMR	P0A421. Positions 2-139.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Family and domain databases
Gene3D	3.30.1470.10. 1 hit.
InterPro	IPR003685. PSI_PsaD. [Graphical view]
Pfam	PF02531. PsaD. 1 hit. [Graphical view]
SUPFAM	SSF64234. PsaD. 1 hit.
ProtoNet	Search...

Entry information

Entry name

PSAD_SYNEL

Accession

Primary (citable) accession number: P0A421
Secondary accession number(s): P20452, P20899

Entry history

Integrated into UniProtKB/Swiss-Prot:	March 15, 2005
Last sequence update:	January 23, 2007
Last modified:	May 1, 2013
This is version 37 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program