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A1EA08

- PSAA_AGRST

UniProt

A1EA08 - PSAA_AGRST

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Protein
Photosystem I P700 chlorophyll a apoprotein A1
Gene
psaA
Organism
Agrostis stolonifera (Creeping bentgrass)
Status
Reviewed - Annotation score: 4 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-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.UniRule annotation

Catalytic activityi

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

Cofactori

P700 is a chlorophyll a/chlorophyll a' dimer, A0 is one or more 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 bindingi573 – 5731Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity
Metal bindingi582 – 5821Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity
Metal bindingi675 – 6751Magnesium (chlorophyll-a' A1 axial ligand; P700 special pair) By similarity
Metal bindingi683 – 6831Magnesium (chlorophyll-a A3 axial ligand) By similarity
Binding sitei691 – 6911Chlorophyll-a A3 By similarity
Binding sitei692 – 6921Phylloquinone 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

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem I P700 chlorophyll a apoprotein A1 (EC:1.97.1.12)
Alternative name(s):
PSI-A
PsaA
Gene namesi
Name:psaA
Encoded oniPlastid; Chloroplast
OrganismiAgrostis stolonifera (Creeping bentgrass)
Taxonomic identifieri63632 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaPoalesPoaceaeBEP cladePooideaePoeaeAgrostidinaeAgrostis

Organism-specific databases

GrameneiA1EA08.

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei70 – 9324Helical; Name=I; Reviewed prediction
Add
BLAST
Transmembranei156 – 17924Helical; Name=II; Reviewed prediction
Add
BLAST
Transmembranei195 – 21925Helical; Name=III; Reviewed prediction
Add
BLAST
Transmembranei291 – 30919Helical; Name=IV; Reviewed prediction
Add
BLAST
Transmembranei346 – 36924Helical; Name=V; Reviewed prediction
Add
BLAST
Transmembranei385 – 41127Helical; Name=VI; Reviewed prediction
Add
BLAST
Transmembranei433 – 45523Helical; Name=VII; Reviewed prediction
Add
BLAST
Transmembranei531 – 54919Helical; Name=VIII; Reviewed prediction
Add
BLAST
Transmembranei589 – 61022Helical; Name=IX; Reviewed prediction
Add
BLAST
Transmembranei664 – 68623Helical; Name=X; Reviewed prediction
Add
BLAST
Transmembranei724 – 74421Helical; Name=XI; Reviewed prediction
Add
BLAST

GO - Cellular componenti

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

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem I, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 750750Photosystem I P700 chlorophyll a apoprotein A1UniRule annotation
PRO_0000275936Add
BLAST

Interactioni

Subunit structurei

The PsaA/B heterodimer binds the P700 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 eukaryotic PSI reaction center is composed of at least 11 subunits By similarity.

Structurei

3D structure databases

ProteinModelPortaliA1EA08.
SMRiA1EA08. Positions 23-750.

Family & Domainsi

Sequence similaritiesi

Belongs to the PsaA/PsaB family.

Keywords - Domaini

Transmembrane, Transmembrane helix

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.

A1EA08-1 [UniParc]FASTAAdd to Basket

« Hide

MIIRSPEPEV KIVVDRDPVK TSFEEWARPG HFSRTLAKGP DTTTWIWNLH    50
ADAHDFDSHT GDLEEISRKV FSAHFGQLSI IFLWLSGMYF HGARFSNYEA 100
WLSDPTHIGP SAQVVWPIVG QEILNGDVGG GFRGIQITSG FFQLWRASGI 150
TSELQLYCTA IGALIFAALM LFAGWFHYHK AAPKLAWFQD VESMLNHHLA 200
GLLGLGSLSW AGHQIHVSLP INQFLDAGVD PKEIPLPHEF ILNRDLLAQL 250
YPSFAEGATP FFTLNWSKYA EFLTFRGGLD PVTGGLWLTD IAHHHLAIAI 300
LFLIAGHMYR TNWGIGHGLK DILEAHKGPF TGQGHKGLYE ILTTSWHAQL 350
SLNLAMLGST TIVVAHHMYA MPPYPYLATD YGTQLSLFTH HMWIGGFLIV 400
GAAAHAAIFM VRDYDPTTRY NDLLDRVLRH RDAIISHLNW VCIFLGFHSF 450
GLYIHNDTMS ALGRPQDMFS DTAIQLQPIF AQWVQNIHAT APGVTAPGAT 500
TSTSLTWGGG ELVAVGGKVA LLPIPLGTAD FLVHHIHAFT IHVTVLILLK 550
GVLFARSSRL IPDKANLGFR FPCDGPGRGG TCQVSAWDHV FLGLFWMYNA 600
ISVVIFHFSW KMQSDVWGTI SDQGVVTHIT GGNFAQSSIT INGWLRDFLW 650
AQASQVIQSY GSSLSAYGLF FLGAHFVWAF SLMFLFSGRG YWQELIESIV 700
WAHNKLKVAP ATQPRALSII QGRAVGVTHY LLGGIATTWA FFLARIIAVG 750
Length:750
Mass (Da):83,131
Last modified:January 23, 2007 - v1
Checksum:i2A5F03474859BE58
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
EF115543 Genomic DNA. Translation: ABK79580.1.
RefSeqiYP_874736.1. NC_008591.1.

Genome annotation databases

GeneIDi4524932.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
EF115543 Genomic DNA. Translation: ABK79580.1 .
RefSeqi YP_874736.1. NC_008591.1.

3D structure databases

ProteinModelPortali A1EA08.
SMRi A1EA08. Positions 23-750.
ModBasei Search...
MobiDBi Search...

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 4524932.

Organism-specific databases

Gramenei A1EA08.

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. "Complete chloroplast genome sequences of Hordeum vulgare, Sorghum bicolor and Agrostis stolonifera, and comparative analyses with other grass genomes."
    Saski C., Lee S.-B., Fjellheim S., Guda C., Jansen R.K., Luo H., Tomkins J., Rognli O.A., Daniell H., Clarke J.L.
    Theor. Appl. Genet. 115:571-590(2007) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: cv. Penn A-4.

Entry informationi

Entry nameiPSAA_AGRST
AccessioniPrimary (citable) accession number: A1EA08
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 6, 2007
Last sequence update: January 23, 2007
Last modified: May 14, 2014
This is version 37 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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