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A1EA07

- PSAB_AGRST

UniProt

A1EA07 - PSAB_AGRST

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Protein
Photosystem I P700 chlorophyll a apoprotein A2
Gene
psaB
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 By similarity.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 bindingi559 – 5591Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity
Metal bindingi568 – 5681Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity
Metal bindingi654 – 6541Magnesium (chlorophyll-a B1 axial ligand; P700 special pair) By similarity
Metal bindingi662 – 6621Magnesium (chlorophyll-a B3 axial ligand) By similarity
Binding sitei670 – 6701Chlorophyll-a B3 By similarity
Binding sitei671 – 6711Phylloquinone B 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
Complete GO annotation...

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 A2 (EC:1.97.1.12)
Alternative name(s):
PSI-B
PsaB
Gene namesi
Name:psaB
Encoded oniPlastid; Chloroplast
OrganismiAgrostis stolonifera (Creeping bentgrass)
Taxonomic identifieri63632 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaPoalesPoaceaeBEP cladePooideaePoeaeAgrostidinaeAgrostis

Organism-specific databases

GrameneiA1EA07.

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei46 – 6924Helical; Name=I; Reviewed prediction
Add
BLAST
Transmembranei135 – 15824Helical; Name=II; Reviewed prediction
Add
BLAST
Transmembranei175 – 19925Helical; Name=III; Reviewed prediction
Add
BLAST
Transmembranei273 – 29119Helical; Name=IV; Reviewed prediction
Add
BLAST
Transmembranei330 – 35324Helical; Name=V; Reviewed prediction
Add
BLAST
Transmembranei369 – 39527Helical; Name=VI; Reviewed prediction
Add
BLAST
Transmembranei417 – 43923Helical; Name=VII; Reviewed prediction
Add
BLAST
Transmembranei517 – 53519Helical; Name=VIII; Reviewed prediction
Add
BLAST
Transmembranei575 – 59622Helical; Name=IX; Reviewed prediction
Add
BLAST
Transmembranei643 – 66523Helical; Name=X; Reviewed prediction
Add
BLAST
Transmembranei707 – 72721Helical; 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 – 734734Photosystem I P700 chlorophyll a apoprotein A2UniRule annotation
PRO_0000277106Add
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

ProteinModelPortaliA1EA07.
SMRiA1EA07. Positions 3-733.

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_00482. PSI_PsaB.
InterProiIPR001280. PSI_PsaA/B.
IPR020586. PSI_PsaA/B_CS.
IPR006244. PSI_PsaB.
[Graphical view]
PfamiPF00223. PsaA_PsaB. 1 hit.
[Graphical view]
PIRSFiPIRSF002905. PSI_A. 1 hit.
PRINTSiPR00257. PHOTSYSPSAAB.
SUPFAMiSSF81558. SSF81558. 1 hit.
TIGRFAMsiTIGR01336. psaB. 1 hit.
PROSITEiPS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

A1EA07-1 [UniParc]FASTAAdd to Basket

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MELRFPRFSQ GLAQDPTTRR IWFGIATAHD FESHDDITEE RLYQNIFASH    50
FGQLAIIFLW TSGNLFHVAW QGNFESWIQD PLHVRPIAHA IWDPHFGQPA 100
VEAFTRGGAA GPVNIAYSGV YQWWYTIGLR TNEDLYTGAL FLLFLSTLSL 150
VAGWLHLQPK WKPSLSWFKN AESRLNHHLS GLFGVSSLAW TGHLVHVAIP 200
ASRGEYVRWN NFLDVLPYPQ GLGPLLTGQW NLYAQNPDSS NHLFGTAQGA 250
GTAILTLLGG FHPQTQSLWL TDIAHHHLAI AFIFLIAGHM YRTNFGIGHS 300
IKDLLEAHTP PGGRLGRGHK GLYDTINNSI HFQLGLALAS LGVITSLVAQ 350
HMYSLPAYAF IAQDFTTQAA LYTHHQYIAG FIMTGAFAHG AIFFIRDYNP 400
EQNEDNVLAR MLDHKEAIIS HLSWASLFLG FHTLGLYVHN DVMLAFGTPE 450
KQILIEPIFA QWIQSAHGKT TYGFDILLSS TNGPAFNAGR SLWLPGWLNA 500
VNENSNSLFL TIGPGDFLVH HAIALGLHTT TLILVKGALD ARGSKLMPDK 550
KDFGYSFPCD GPGRGGTCDI SAWDAFYLAV FWMLNTIGWV TFYWHWKHIT 600
LWQGNVSQFN ESSTYLMGWL RDYLWLNSSQ LINGYNPFGM NSLSVWAWMF 650
LFGHLVWATG FMFLISWRGY WQELIETLAW AHERTPLANL IRWRDKPVAL 700
SIVQARLVGL AHFSVGYIFT YAAFLIASTS GKFG 734
Length:734
Mass (Da):82,527
Last modified:January 23, 2007 - v1
Checksum:i209EBCE5DAC14517
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
EF115543 Genomic DNA. Translation: ABK79579.1.
RefSeqiYP_874735.1. NC_008591.1.

Genome annotation databases

GeneIDi4524931.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
EF115543 Genomic DNA. Translation: ABK79579.1 .
RefSeqi YP_874735.1. NC_008591.1.

3D structure databases

ProteinModelPortali A1EA07.
SMRi A1EA07. Positions 3-733.
ModBasei Search...

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 4524931.

Organism-specific databases

Gramenei A1EA07.

Family and domain databases

Gene3Di 1.20.1130.10. 1 hit.
HAMAPi MF_00482. PSI_PsaB.
InterProi IPR001280. PSI_PsaA/B.
IPR020586. PSI_PsaA/B_CS.
IPR006244. PSI_PsaB.
[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 TIGR01336. psaB. 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 nameiPSAB_AGRST
AccessioniPrimary (citable) accession number: A1EA07
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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