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P05311

- PSAB_PEA

UniProt

P05311 - PSAB_PEA

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Protein
Photosystem I P700 chlorophyll a apoprotein A2
Gene
psaB, psaA2
Organism
Pisum sativum (Garden pea)
Status
Reviewed - Annotation score: 4 out of 5 - Experimental evidence at protein leveli

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
Synonyms:psaA2
Encoded oniPlastid; Chloroplast
OrganismiPisum sativum (Garden pea)
Taxonomic identifieri3888 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsfabidsFabalesFabaceaePapilionoideaeFabeaePisum

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_0000088630Add
BLAST

Proteomic databases

PRIDEiP05311.

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.

Protein-protein interaction databases

DIPiDIP-60282N.

Structurei

Secondary structure

Legend: HelixTurnBeta strand
Show more details
Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Beta strandi6 – 83
Helixi12 – 143
Helixi19 – 224
Turni23 – 264
Beta strandi32 – 365
Helixi39 – 479
Turni48 – 514
Helixi52 – 6413
Beta strandi67 – 748
Turni75 – 784
Beta strandi82 – 843
Beta strandi101 – 1055
Beta strandi109 – 1113
Helixi120 – 1223
Turni123 – 1264
Helixi139 – 1468
Helixi148 – 1558
Beta strandi158 – 1614
Helixi166 – 1683
Turni173 – 1753
Helixi178 – 1814
Helixi183 – 19614
Helixi199 – 2024
Beta strandi212 – 2143
Beta strandi217 – 2204
Helixi224 – 2263
Turni230 – 2334
Beta strandi234 – 2363
Beta strandi244 – 2496
Turni263 – 2653
Turni270 – 2745
Helixi275 – 28713
Beta strandi288 – 2914
Beta strandi294 – 2963
Beta strandi301 – 3055
Beta strandi313 – 3164
Helixi322 – 3265
Turni327 – 3293
Helixi333 – 3364
Turni338 – 3403
Helixi341 – 35111
Turni352 – 3543
Beta strandi358 – 3603
Beta strandi362 – 3643
Turni367 – 3693
Beta strandi370 – 3734
Turni374 – 3807
Helixi381 – 3899
Turni390 – 3967
Turni400 – 4034
Turni407 – 4148
Helixi415 – 4184
Turni419 – 4224
Helixi423 – 44321
Turni444 – 4474
Helixi458 – 4625
Turni463 – 4686
Turni477 – 4815
Beta strandi482 – 4854
Beta strandi487 – 4893
Beta strandi490 – 4967
Beta strandi501 – 5044
Helixi516 – 5227
Turni523 – 5286
Helixi529 – 53810
Helixi540 – 5423
Beta strandi547 – 5493
Helixi550 – 5534
Helixi563 – 5653
Helixi573 – 5797
Turni580 – 5889
Helixi589 – 5935
Beta strandi594 – 5996
Beta strandi602 – 6043
Helixi607 – 6115
Beta strandi614 – 6163
Turni617 – 6215
Turni623 – 6253
Helixi629 – 6324
Turni633 – 6353
Helixi636 – 6383
Helixi645 – 65814
Helixi662 – 6654
Helixi669 – 67810
Helixi682 – 6843
Beta strandi688 – 6903
Beta strandi694 – 6963
Helixi704 – 7085
Beta strandi709 – 7124
Helixi713 – 72614
Beta strandi729 – 7313

3D structure databases

Select the link destinations:
PDBe
RCSB PDB
PDBj
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1YO9model-B1-734[»]
2O01X-ray3.40B2-733[»]
2WSCX-ray3.30B1-734[»]
2WSEX-ray3.49B1-734[»]
2WSFX-ray3.48B1-734[»]
3LW5X-ray3.30B2-734[»]
ProteinModelPortaliP05311.
SMRiP05311. Positions 2-733.

Miscellaneous databases

EvolutionaryTraceiP05311.

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.

P05311-1 [UniParc]FASTAAdd to Basket

« Hide

MALRIPRFSQ GIAQDPTTRR IWFGIATAHD FESHDDITEG RLYQNIFASH    50
FGQLAIIFLW TSGNLFHVAW QGNFEAWVQD PFHVRPIAHA IWDPHFGQPA 100
VEAFTRGGAL GPVNNAYSGV YQWWYTIGLR TNEDLYTGAI FLLFLSFISL 150
LAGWLHLQPK WKPSVSWFKN AESRLNHHLS GLFGVSSLAW AGHLVHVAIP 200
GSRGEYVRWN NFLDVLPYPQ GLGPLLTGQW NLYAQNPSSS NHLFGTTQGA 250
GTAILTILGG FHPQTQSLWL TDVAHHHLAI AFLFLIGGLM YRTNFGIGHS 300
IKYILEAHIP PGGRLGRGHK GLYDTINNSI HFQLGLALAS LGVITSLVAQ 350
HMYSLPAYAF IAQDFTTQAA LYTHHQYIAG FIMTGAFAHG PIFFIRDYNP 400
EQNADNVLAR MLEHKEAIIS HLSWASLFLG FHTLGLYVHN DVMLAFGTPE 450
KQILIEPIFA QWIQSAHGKT TYGFDIPLSS TNGPALNAGR NIWLPGWLNA 500
INENSNSLFL TIGPGDFLVH HAIALGLHTT TLILVKGALD ARGSKLMPDK 550
KDFGYSFPCD GPGRGGTCDI SAWDDFYLAV FWMLNTIGWV TFYWHWKHIT 600
LWRGNVSQFN ESSTYLMGWL RDYLWLNSSQ LINGITPLVC NSLSVWAWMF 650
LFGHLVWATG FMFLISWRGY WQELIETLAW AHERTPLANL IRWRDKPVAL 700
SIVQARLVGL VHFSVGYIFT YAAFLIASTS GKFG 734
Length:734
Mass (Da):82,412
Last modified:November 1, 1988 - v1
Checksum:i2ACF1F77D46FA8E7
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
X05423 Genomic DNA. Translation: CAA29004.1.
PIRiS00704.
RefSeqiYP_003587537.1. NC_014057.1.

Genome annotation databases

GeneIDi9073070.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
X05423 Genomic DNA. Translation: CAA29004.1 .
PIRi S00704.
RefSeqi YP_003587537.1. NC_014057.1.

3D structure databases

Select the link destinations:
PDBe
RCSB PDB
PDBj
Links Updated
Entry Method Resolution (Å) Chain Positions PDBsum
1YO9 model - B 1-734 [» ]
2O01 X-ray 3.40 B 2-733 [» ]
2WSC X-ray 3.30 B 1-734 [» ]
2WSE X-ray 3.49 B 1-734 [» ]
2WSF X-ray 3.48 B 1-734 [» ]
3LW5 X-ray 3.30 B 2-734 [» ]
ProteinModelPortali P05311.
SMRi P05311. Positions 2-733.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

DIPi DIP-60282N.

Proteomic databases

PRIDEi P05311.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 9073070.

Miscellaneous databases

EvolutionaryTracei P05311.

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. "Sequence of two genes in pea chloroplast DNA coding for 84 and 82 kD polypeptides of the photosystem I complex."
    Lehmbeck J., Rasmussen O.F., Bookjans G.B., Jepsen B.R., Stummann B.M., Henningsen K.W.
    Plant Mol. Biol. 7:3-10(1986)
    [AGRICOLA] [Europe PMC]
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].

Entry informationi

Entry nameiPSAB_PEA
AccessioniPrimary (citable) accession number: P05311
Entry historyi
Integrated into UniProtKB/Swiss-Prot: November 1, 1988
Last sequence update: November 1, 1988
Last modified: May 14, 2014
This is version 101 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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