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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.UniRule annotation

Catalytic activityi

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

Cofactori

Note: 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.UniRule annotation

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi559 – 5591Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
Metal bindingi568 – 5681Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
Metal bindingi654 – 6541Magnesium (chlorophyll-a B1 axial ligand; P700 special pair)UniRule annotation
Metal bindingi662 – 6621Magnesium (chlorophyll-a B3 axial ligand)UniRule annotation
Binding sitei670 – 6701Chlorophyll-a B3UniRule annotation
Binding sitei671 – 6711Phylloquinone BUniRule annotation

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 A2UniRule annotation (EC:1.97.1.12UniRule annotation)
Alternative name(s):
PSI-BUniRule annotation
PsaBUniRule annotation
Gene namesi
Name:psaBUniRule annotation
Encoded oniPlastid; Chloroplast
OrganismiCoffea arabica (Arabian coffee)
Taxonomic identifieri13443 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaeasteridslamiidsGentianalesRubiaceaeIxoroideaeCoffeeaeCoffea

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei46 – 6924Helical; Name=IUniRule annotationAdd
BLAST
Transmembranei135 – 15824Helical; Name=IIUniRule annotationAdd
BLAST
Transmembranei175 – 19925Helical; Name=IIIUniRule annotationAdd
BLAST
Transmembranei273 – 29119Helical; Name=IVUniRule annotationAdd
BLAST
Transmembranei330 – 35324Helical; Name=VUniRule annotationAdd
BLAST
Transmembranei369 – 39527Helical; Name=VIUniRule annotationAdd
BLAST
Transmembranei417 – 43923Helical; Name=VIIUniRule annotationAdd
BLAST
Transmembranei517 – 53519Helical; Name=VIIIUniRule annotationAdd
BLAST
Transmembranei575 – 59622Helical; Name=IXUniRule annotationAdd
BLAST
Transmembranei643 – 66523Helical; Name=XUniRule annotationAdd
BLAST
Transmembranei707 – 72721Helical; Name=XIUniRule annotationAdd
BLAST

GO - Cellular componenti

  1. chloroplast thylakoid membrane Source: UniProtKB-HAMAP
  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 A2PRO_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.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliA0A334.
SMRiA0A334. Positions 2-733.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the PsaA/PsaB family.UniRule annotation

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

« Hide

        10         20         30         40         50
MALRFPRFSQ GLAQDPTTRR IWFGIATAHD FESHDDITEE RLYQNIFASH
60 70 80 90 100
FGQLAIIFLW TSGNLFHVAW QGNFESWVQD PLHVRPIAHA IWDPHFGQPA
110 120 130 140 150
VEAFTRGGAL GPVNIAYSGV YQWWYTIGLR TNEDLYTGAL FLLFISAIFL
160 170 180 190 200
IAGWLHLQPK WKPSVSWFKN AESRLNHHLS GLFGVSSLAW TGHLVHVAIP
210 220 230 240 250
GSRGEYVRWN NFLDVLPHPQ GLGPLFTGQW NLYAQNPDSG SHLFGTSQGA
260 270 280 290 300
GTAILTLLGG FHPQTQSLWL TDIAHHHLAI AFIFLVAGHM YRTNFGIGHS
310 320 330 340 350
MKDLLDAHIP PGGRLGRGHK GLYDTINNSL HFQLGLALAS LGVITSLVAQ
360 370 380 390 400
HMYSLPAYAF IAQDFTTQAA LYTHHQYIAG FIMTGAFAHG AIFFIRDYNP
410 420 430 440 450
EQNEDNVLAR MLDHKEAIIS HLSWASLFLG FHTLGLYVHN DVMLAFGTPE
460 470 480 490 500
KQILIEPIFA QWIQSAHGKT SYGFDVLLSS TSGPAFNAGR SIWLPGWLNA
510 520 530 540 550
VNENSNSLFL TIGPGDFLVH HAIALGLHTT TLILVKGALD ARGSKLMPDK
560 570 580 590 600
KDFGYSFPCD GPGRGGTCDI SAWDAFYLAV FWMLNTIGWV TFYWHWKHIT
610 620 630 640 650
LWQGNVSQFN ESSTYLMGWL RDYLWLNSSQ LINGYNPFGM NSLSVWAWMF
660 670 680 690 700
LFGHLVWAIG FMFLISWRGY WQELIETLAW AHERTPLANL IRWRDKPVAL
710 720 730
SIVQARLVGL AHFSVGYIFT YAAFLIASTS GKFG
Length:734
Mass (Da):82,439
Last modified:November 14, 2006 - v1
Checksum:i0EA1499536194031
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
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:
EMBLi
GenBanki
DDBJi
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: November 26, 2014
This is version 41 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