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A2BTA0

- PSAA_PROMS

UniProt

A2BTA0 - PSAA_PROMS

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Protein

Photosystem I P700 chlorophyll a apoprotein A1

Gene
psaA, A9601_17281
Organism
Prochlorococcus marinus (strain AS9601)
Status
Reviewed - Annotation score: 3 out of 5 - Protein inferred from homologyi

Functioni

PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6 By similarity.UniRule annotation

Catalytic activityi

Reduced plastocyanin + oxidized ferredoxin + light = oxidized plastocyanin + reduced ferredoxin.UniRule annotation

Cofactori

PSI electron transfer chain: 5 divinyl chlorophyll a, 1 divinyl chlorophyll a', 2 phylloquinones and 3 4Fe-4S clusters. PSI core antenna: 90 divinyl chlorophyll a, 22 carotenoids, 3 phospholipids and 1 galactolipid. P700 is a divinyl chlorophyll a/divinyl chlorophyll a' dimer, A0 is one or more divinyl chlorophyll a, A1 is one or both phylloquinones and FX is a shared 4Fe-4S iron-sulfur center By similarity.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi600 – 6001Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity
Metal bindingi609 – 6091Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity
Metal bindingi692 – 6921Magnesium (divinyl chlorophyll-a' A1 axial ligand; P700 special pair) By similarity
Metal bindingi700 – 7001Magnesium (divinyl chlorophyll-a A3 axial ligand) By similarity
Binding sitei708 – 7081Divinyl chlorophyll-a A3 By similarity
Binding sitei709 – 7091Phylloquinone A By similarity

GO - Molecular functioni

  1. 4 iron, 4 sulfur cluster binding Source: UniProtKB-KW
  2. chlorophyll binding Source: UniProtKB-KW
  3. electron carrier activity Source: UniProtKB-HAMAP
  4. magnesium ion binding Source: UniProtKB-HAMAP
  5. oxidoreductase activity Source: UniProtKB-KW

GO - Biological processi

  1. photosynthesis Source: UniProtKB-HAMAP
  2. protein-chromophore linkage Source: UniProtKB-KW
Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

Electron transport, Photosynthesis, Transport

Keywords - Ligandi

4Fe-4S, Chlorophyll, Chromophore, Iron, Iron-sulfur, Magnesium, Metal-binding

Enzyme and pathway databases

BioCyciPMAR146891:GH90-1760-MONOMER.

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem I P700 chlorophyll a apoprotein A1 (EC:1.97.1.12)
Alternative name(s):
PsaA
Gene namesi
Name:psaA
Ordered Locus Names:A9601_17281
OrganismiProchlorococcus marinus (strain AS9601)
Taxonomic identifieri146891 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaProchloralesProchlorococcaceaeProchlorococcus
ProteomesiUP000002590: Chromosome

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei76 – 9924Helical; Name=I; Reviewed predictionAdd
BLAST
Transmembranei162 – 18524Helical; Name=II; Reviewed predictionAdd
BLAST
Transmembranei201 – 22525Helical; Name=III; Reviewed predictionAdd
BLAST
Transmembranei309 – 32719Helical; Name=IV; Reviewed predictionAdd
BLAST
Transmembranei368 – 39124Helical; Name=V; Reviewed predictionAdd
BLAST
Transmembranei407 – 43327Helical; Name=VI; Reviewed predictionAdd
BLAST
Transmembranei455 – 47723Helical; Name=VII; Reviewed predictionAdd
BLAST
Transmembranei558 – 57619Helical; Name=VIII; Reviewed predictionAdd
BLAST
Transmembranei616 – 63722Helical; Name=IX; Reviewed predictionAdd
BLAST
Transmembranei681 – 70323Helical; Name=X; Reviewed predictionAdd
BLAST
Transmembranei741 – 76121Helical; Name=XI; Reviewed predictionAdd
BLAST

GO - Cellular componenti

  1. integral component of membrane Source: UniProtKB-KW
  2. photosystem I Source: UniProtKB-KW
  3. thylakoid membrane Source: UniProtKB-SubCell
Complete GO annotation...

Keywords - Cellular componenti

Membrane, Photosystem I, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 767767Photosystem I P700 chlorophyll a apoprotein A1UniRule annotationPRO_0000294199Add
BLAST

Interactioni

Subunit structurei

The PsaA/B heterodimer binds the P700 divinyl chlorophyll special pair and subsequent electron acceptors. PSI consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. The cyanobacterial PSI reaction center is composed of one copy each of PsaA,B,C,D,E,F,I,J,K,L,M and X, and forms trimeric complexes By similarity.

Protein-protein interaction databases

STRINGi146891.A9601_17281.

Structurei

3D structure databases

ProteinModelPortaliA2BTA0.
SMRiA2BTA0. Positions 20-767.

Family & Domainsi

Sequence similaritiesi

Belongs to the PsaA/PsaB family.

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiNOG05023.
HOGENOMiHOG000276868.
KOiK02689.
OMAiTWAFFHA.
OrthoDBiEOG60W7PS.

Family and domain databases

Gene3Di1.20.1130.10. 1 hit.
HAMAPiMF_00458. PSI_PsaA.
InterProiIPR006243. PSI_PsaA.
IPR001280. PSI_PsaA/B.
IPR020586. PSI_PsaA/B_CS.
[Graphical view]
PfamiPF00223. PsaA_PsaB. 1 hit.
[Graphical view]
PIRSFiPIRSF002905. PSI_A. 1 hit.
PRINTSiPR00257. PHOTSYSPSAAB.
SUPFAMiSSF81558. SSF81558. 1 hit.
TIGRFAMsiTIGR01335. psaA. 1 hit.
PROSITEiPS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

A2BTA0-1 [UniParc]FASTAAdd to Basket

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MTISPPESGE KNKKVLEDPV KADPRPIDFA KLDKPGFWSS KLSKGPKTTT    50
WIWNLHADAH DFDVHTGDAE EATRKIFSAH FGHLAVIFIW MSAAFFHGAR 100
FSNYSGWLAD PTHVKPGAQQ VWAIVGQEML NADLGANYNG IQISSGIFHM 150
WRAWGITNES ELMALAIGAV VMAALMLHAG IFHYHKAAPK MEWFQDIESM 200
LNHHIAGLVG LGSLAWAGHC IHIGAPTAAL LDAIDAGSPL VINGKEIATI 250
ADMPMPHQLC DPQIIGQIFP GLASGTGNFF SLNWLAFSDF LTFKGGLNPV 300
TGSLWMTDVS HHHLAFGVIA IIGGHMYRTN YGIGHSMKEI LDSQQGDPIL 350
FPAPKGHQGL FEFMAESRHA QLSVNLAMLG SISILVSHHM YAMPPYPYIA 400
TDYMTVLGLF THHMWIGGLF IVGAGAHAGI AMVRDYDPAK HIDNVLDRIL 450
KARDALISHL NWVCMWLGFH SFGLYIHNDT MRALGRPQDM FSDSAIQLQP 500
IFAQWVQSIQ ASAVGTFLLA GTSEALPHKA LSEVFNGSLV EVGGKVAIAP 550
IPLGTADLMI HHIHAFQIHV TVLILLKGVL YARSSRLIPD KASLGFRFPC 600
DGPGRGGTCQ VSSWDHVFLA LFWMYNCLSI VIFHFSWKMQ SDVWGLTGGN 650
FAQSSITING WLRDFLWAQA SQVLTSYGQS ISMYGLMFLG AHFIWAFSLM 700
FLFSGRGYWQ ELFESIVWAH NKLKVAPTIQ PRALSITQGR AVGVTHFLVG 750
GIATTWAFFH ARLFGLG 767
Length:767
Mass (Da):84,373
Last modified:February 20, 2007 - v1
Checksum:i4C8C1A669AAF75E2
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
CP000551 Genomic DNA. Translation: ABM71011.1.
RefSeqiYP_001010118.1. NC_008816.1.

Genome annotation databases

EnsemblBacteriaiABM71011; ABM71011; A9601_17281.
GeneIDi4718459.
KEGGipmb:A9601_17281.
PATRICi22984991. VBIProMar75723_1738.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
CP000551 Genomic DNA. Translation: ABM71011.1 .
RefSeqi YP_001010118.1. NC_008816.1.

3D structure databases

ProteinModelPortali A2BTA0.
SMRi A2BTA0. Positions 20-767.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

STRINGi 146891.A9601_17281.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

EnsemblBacteriai ABM71011 ; ABM71011 ; A9601_17281 .
GeneIDi 4718459.
KEGGi pmb:A9601_17281.
PATRICi 22984991. VBIProMar75723_1738.

Phylogenomic databases

eggNOGi NOG05023.
HOGENOMi HOG000276868.
KOi K02689.
OMAi TWAFFHA.
OrthoDBi EOG60W7PS.

Enzyme and pathway databases

BioCyci PMAR146891:GH90-1760-MONOMER.

Family and domain databases

Gene3Di 1.20.1130.10. 1 hit.
HAMAPi MF_00458. PSI_PsaA.
InterProi IPR006243. PSI_PsaA.
IPR001280. PSI_PsaA/B.
IPR020586. PSI_PsaA/B_CS.
[Graphical view ]
Pfami PF00223. PsaA_PsaB. 1 hit.
[Graphical view ]
PIRSFi PIRSF002905. PSI_A. 1 hit.
PRINTSi PR00257. PHOTSYSPSAAB.
SUPFAMi SSF81558. SSF81558. 1 hit.
TIGRFAMsi TIGR01335. psaA. 1 hit.
PROSITEi PS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
[Graphical view ]
ProtoNeti Search...

Publicationsi

  1. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: AS9601.

Entry informationi

Entry nameiPSAA_PROMS
AccessioniPrimary (citable) accession number: A2BTA0
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 10, 2007
Last sequence update: February 20, 2007
Last modified: May 14, 2014
This is version 55 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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