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A1E9S3

- PSAB_SORBI

UniProt

A1E9S3 - PSAB_SORBI

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Protein

Photosystem I P700 chlorophyll a apoprotein A2

Gene
psaB
Organism
Sorghum bicolor (Sorghum) (Sorghum vulgare)
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
OrganismiSorghum bicolor (Sorghum) (Sorghum vulgare)
Taxonomic identifieri4558 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaPoalesPoaceaePACMAD cladePanicoideaeAndropogoneaeSorghum
ProteomesiUP000000768: Chloroplast

Organism-specific databases

GrameneiA1E9S3.

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_0000277135Add
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.

Protein-protein interaction databases

STRINGi4558.Sb10g024935.1.

Structurei

3D structure databases

ProteinModelPortaliA1E9S3.
SMRiA1E9S3. Positions 3-733.

Family & Domainsi

Sequence similaritiesi

Belongs to the PsaA/PsaB family.

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiNOG04867.
KOiK02690.
OMAiFNAGRNI.

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.

A1E9S3-1 [UniParc]FASTAAdd to Basket

« Hide

MELRFPRFSQ GLAQDPTTRR IWFGIATAHD FESHDDITEE RLYQNIFASH    50
FGQLAIIFLW TSGNLFHVAW QGNFESWIQD PLHVRPIAHA IWDPHFGQPA 100
VEAFTRGGAA GPVNIAYSGV YQWWYTIGLR TNEDLYTGAL FLLFLSTLSL 150
IGGWLHLQPK WKPSLSWFKN AESRLNHHLS GLFGVSSLAW TGHLVHVAIP 200
GSRGEYVRWN NFLDVLPYPQ GLGPLLTGQW NLYAQNPDSS NHLFGTTQGA 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 NIWLPGWLNA 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):82,570
Last modified:January 23, 2007 - v1
Checksum:i1D8165BBEDBA608F
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
EF115542 Genomic DNA. Translation: ABK79495.1.
RefSeqiYP_899406.1. NC_008602.1.

Genome annotation databases

GeneIDi4549119.
KEGGisbi:SobiCp021.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
EF115542 Genomic DNA. Translation: ABK79495.1 .
RefSeqi YP_899406.1. NC_008602.1.

3D structure databases

ProteinModelPortali A1E9S3.
SMRi A1E9S3. Positions 3-733.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

STRINGi 4558.Sb10g024935.1.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 4549119.
KEGGi sbi:SobiCp021.

Organism-specific databases

Gramenei A1E9S3.

Phylogenomic databases

eggNOGi NOG04867.
KOi K02690.
OMAi FNAGRNI.

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. BTx623.

Entry informationi

Entry nameiPSAB_SORBI
AccessioniPrimary (citable) accession number: A1E9S3
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 6, 2007
Last sequence update: January 23, 2007
Last modified: May 14, 2014
This is version 43 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

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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