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A0A334

- PSAB_COFAR

UniProt

A0A334 - PSAB_COFAR

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Protein

Photosystem I P700 chlorophyll a apoprotein A2

Gene
psaB
Organism
Coffea arabica (Arabian coffee)
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

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
OrganismiCoffea arabica (Arabian coffee)
Taxonomic identifieri13443 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaeasteridslamiidsGentianalesRubiaceaeIxoroideaeCoffeeaeCoffea

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei46 – 6924Helical; Name=I; Reviewed predictionAdd
BLAST
Transmembranei135 – 15824Helical; Name=II; Reviewed predictionAdd
BLAST
Transmembranei175 – 19925Helical; Name=III; Reviewed predictionAdd
BLAST
Transmembranei273 – 29119Helical; Name=IV; Reviewed predictionAdd
BLAST
Transmembranei330 – 35324Helical; Name=V; Reviewed predictionAdd
BLAST
Transmembranei369 – 39527Helical; Name=VI; Reviewed predictionAdd
BLAST
Transmembranei417 – 43923Helical; Name=VII; Reviewed predictionAdd
BLAST
Transmembranei517 – 53519Helical; Name=VIII; Reviewed predictionAdd
BLAST
Transmembranei575 – 59622Helical; Name=IX; Reviewed predictionAdd
BLAST
Transmembranei643 – 66523Helical; Name=X; Reviewed predictionAdd
BLAST
Transmembranei707 – 72721Helical; Name=XI; Reviewed predictionAdd
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 annotationPRO_0000277109Add
BLAST

Proteomic databases

PRIDEiA0A334.

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

ProteinModelPortaliA0A334.
SMRiA0A334. Positions 2-733.

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.

A0A334-1 [UniParc]FASTAAdd to Basket

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MALRFPRFSQ GLAQDPTTRR IWFGIATAHD FESHDDITEE RLYQNIFASH    50
FGQLAIIFLW TSGNLFHVAW QGNFESWVQD PLHVRPIAHA IWDPHFGQPA 100
VEAFTRGGAL GPVNIAYSGV YQWWYTIGLR TNEDLYTGAL FLLFISAIFL 150
IAGWLHLQPK WKPSVSWFKN AESRLNHHLS GLFGVSSLAW TGHLVHVAIP 200
GSRGEYVRWN NFLDVLPHPQ GLGPLFTGQW NLYAQNPDSG SHLFGTSQGA 250
GTAILTLLGG FHPQTQSLWL TDIAHHHLAI AFIFLVAGHM YRTNFGIGHS 300
MKDLLDAHIP PGGRLGRGHK GLYDTINNSL HFQLGLALAS LGVITSLVAQ 350
HMYSLPAYAF IAQDFTTQAA LYTHHQYIAG FIMTGAFAHG AIFFIRDYNP 400
EQNEDNVLAR MLDHKEAIIS HLSWASLFLG FHTLGLYVHN DVMLAFGTPE 450
KQILIEPIFA QWIQSAHGKT SYGFDVLLSS TSGPAFNAGR SIWLPGWLNA 500
VNENSNSLFL TIGPGDFLVH HAIALGLHTT TLILVKGALD ARGSKLMPDK 550
KDFGYSFPCD GPGRGGTCDI SAWDAFYLAV FWMLNTIGWV TFYWHWKHIT 600
LWQGNVSQFN ESSTYLMGWL RDYLWLNSSQ LINGYNPFGM NSLSVWAWMF 650
LFGHLVWAIG FMFLISWRGY WQELIETLAW AHERTPLANL IRWRDKPVAL 700
SIVQARLVGL AHFSVGYIFT YAAFLIASTS GKFG 734
Length:734
Mass (Da):82,439
Last modified:November 14, 2006 - v1
Checksum:i0EA1499536194031
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
EF044213 Genomic DNA. Translation: ABJ89678.1.
RefSeqiYP_817481.1. NC_008535.1.

Genome annotation databases

GeneIDi4421875.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
EF044213 Genomic DNA. Translation: ABJ89678.1 .
RefSeqi YP_817481.1. NC_008535.1.

3D structure databases

ProteinModelPortali A0A334.
SMRi A0A334. Positions 2-733.
ModBasei Search...
MobiDBi Search...

Proteomic databases

PRIDEi A0A334.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 4421875.

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. "The complete nucleotide sequence of the coffee (Coffea arabica L.) chloroplast genome: organization and implications for biotechnology and phylogenetic relationships amongst angiosperms."
    Samson N., Bausher M.G., Lee S.-B., Jansen R.K., Daniell H.
    Plant Biotechnol. J. 5:339-353(2007) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Entry informationi

Entry nameiPSAB_COFAR
AccessioniPrimary (citable) accession number: A0A334
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 6, 2007
Last sequence update: November 14, 2006
Last modified: May 14, 2014
This is version 38 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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