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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.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
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=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_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.UniRule annotation

Protein-protein interaction databases

STRINGi4558.Sb10g024935.1.

Structurei

3D structure databases

ProteinModelPortaliA1E9S3.
SMRiA1E9S3. Positions 3-733.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the PsaA/PsaB family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiNOG04867.
InParanoidiA1E9S3.
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

        10         20         30         40         50
MELRFPRFSQ GLAQDPTTRR IWFGIATAHD FESHDDITEE RLYQNIFASH
60 70 80 90 100
FGQLAIIFLW TSGNLFHVAW QGNFESWIQD PLHVRPIAHA IWDPHFGQPA
110 120 130 140 150
VEAFTRGGAA GPVNIAYSGV YQWWYTIGLR TNEDLYTGAL FLLFLSTLSL
160 170 180 190 200
IGGWLHLQPK WKPSLSWFKN AESRLNHHLS GLFGVSSLAW TGHLVHVAIP
210 220 230 240 250
GSRGEYVRWN NFLDVLPYPQ GLGPLLTGQW NLYAQNPDSS NHLFGTTQGA
260 270 280 290 300
GTAILTLLGG FHPQTQSLWL TDIAHHHLAI AFIFLIAGHM YRTNFGIGHS
310 320 330 340 350
IKDLLEAHTP PGGRLGRGHK GLYDTINNSI 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 TYGFDILLSS TNGPAFNAGR NIWLPGWLNA
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
LFGHLVWATG FMFLISWRGY WQELIETLAW AHERTPLANL IRWRDKPVAL
710 720 730
SIVQARLVGL AHFSVGYIFT YAAFLIASTS GKFG
Length:734
Mass (Da):82,570
Last modified:January 23, 2007 - v1
Checksum:i1D8165BBEDBA608F
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
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:
EMBLi
GenBanki
DDBJi
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.
InParanoidi A1E9S3.
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: November 26, 2014
This is version 46 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