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A1EA08 (PSAA_AGRST) Reviewed, UniProtKB/Swiss-Prot

Last modified April 16, 2014. Version 36. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (1) | Third-party data text xml rdf/xml gff fasta
to top of pageNames·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order

Names and origin

Protein namesRecommended name:
Photosystem I P700 chlorophyll a apoprotein A1

EC=1.97.1.12
Alternative name(s):
PSI-A
PsaA
Gene names
Name:psaA
Encoded onPlastid; Chloroplast
OrganismAgrostis stolonifera (Creeping bentgrass)
Taxonomic identifier63632 [NCBI]
Taxonomic lineageEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaPoalesPoaceaeBEP cladePooideaePoeaeAgrostidinaeAgrostis

Protein attributes

Sequence length750 AA.
Sequence statusComplete.
Protein existenceInferred from homology

General annotation (Comments)

Function

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. HAMAP-Rule MF_00458

Catalytic activity

Reduced plastocyanin + oxidized ferredoxin + light = oxidized plastocyanin + reduced ferredoxin. HAMAP-Rule MF_00458

Cofactor

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.

Subunit structure

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.

Subcellular location

Plastidchloroplast thylakoid membrane; Multi-pass membrane protein By similarity HAMAP-Rule MF_00458.

Sequence similarities

Belongs to the PsaA/PsaB family.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 750750Photosystem I P700 chlorophyll a apoprotein A1 HAMAP-Rule MF_00458
PRO_0000275936

Regions

Transmembrane70 – 9324Helical; Name=I; Potential
Transmembrane156 – 17924Helical; Name=II; Potential
Transmembrane195 – 21925Helical; Name=III; Potential
Transmembrane291 – 30919Helical; Name=IV; Potential
Transmembrane346 – 36924Helical; Name=V; Potential
Transmembrane385 – 41127Helical; Name=VI; Potential
Transmembrane433 – 45523Helical; Name=VII; Potential
Transmembrane531 – 54919Helical; Name=VIII; Potential
Transmembrane589 – 61022Helical; Name=IX; Potential
Transmembrane664 – 68623Helical; Name=X; Potential
Transmembrane724 – 74421Helical; Name=XI; Potential

Sites

Metal binding5731Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity
Metal binding5821Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity
Metal binding6751Magnesium (chlorophyll-a' A1 axial ligand; P700 special pair) By similarity
Metal binding6831Magnesium (chlorophyll-a A3 axial ligand) By similarity
Binding site6911Chlorophyll-a A3 By similarity
Binding site6921Phylloquinone A By similarity

Sequences

Sequence LengthMass (Da)Tools
A1EA08 [UniParc].

Last modified January 23, 2007. Version 1.
Checksum: 2A5F03474859BE58

FASTA75083,131
        10         20         30         40         50         60 
MIIRSPEPEV KIVVDRDPVK TSFEEWARPG HFSRTLAKGP DTTTWIWNLH ADAHDFDSHT 

        70         80         90        100        110        120 
GDLEEISRKV FSAHFGQLSI IFLWLSGMYF HGARFSNYEA WLSDPTHIGP SAQVVWPIVG 

       130        140        150        160        170        180 
QEILNGDVGG GFRGIQITSG FFQLWRASGI TSELQLYCTA IGALIFAALM LFAGWFHYHK 

       190        200        210        220        230        240 
AAPKLAWFQD VESMLNHHLA GLLGLGSLSW AGHQIHVSLP INQFLDAGVD PKEIPLPHEF 

       250        260        270        280        290        300 
ILNRDLLAQL YPSFAEGATP FFTLNWSKYA EFLTFRGGLD PVTGGLWLTD IAHHHLAIAI 

       310        320        330        340        350        360 
LFLIAGHMYR TNWGIGHGLK DILEAHKGPF TGQGHKGLYE ILTTSWHAQL SLNLAMLGST 

       370        380        390        400        410        420 
TIVVAHHMYA MPPYPYLATD YGTQLSLFTH HMWIGGFLIV GAAAHAAIFM VRDYDPTTRY 

       430        440        450        460        470        480 
NDLLDRVLRH RDAIISHLNW VCIFLGFHSF GLYIHNDTMS ALGRPQDMFS DTAIQLQPIF 

       490        500        510        520        530        540 
AQWVQNIHAT APGVTAPGAT TSTSLTWGGG ELVAVGGKVA LLPIPLGTAD FLVHHIHAFT 

       550        560        570        580        590        600 
IHVTVLILLK GVLFARSSRL IPDKANLGFR FPCDGPGRGG TCQVSAWDHV FLGLFWMYNA 

       610        620        630        640        650        660 
ISVVIFHFSW KMQSDVWGTI SDQGVVTHIT GGNFAQSSIT INGWLRDFLW AQASQVIQSY 

       670        680        690        700        710        720 
GSSLSAYGLF FLGAHFVWAF SLMFLFSGRG YWQELIESIV WAHNKLKVAP ATQPRALSII 

       730        740        750 
QGRAVGVTHY LLGGIATTWA FFLARIIAVG 

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References

[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. Penn A-4.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
EF115543 Genomic DNA. Translation: ABK79580.1.
RefSeqYP_874736.1. NC_008591.1.

3D structure databases

ProteinModelPortalA1EA08.
SMRA1EA08. Positions 23-750.
ModBaseSearch...
MobiDBSearch...

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

GeneID4524932.

Organism-specific databases

GrameneA1EA08.

Phylogenomic databases

ProtClustDBCHL00056.

Family and domain databases

Gene3D1.20.1130.10. 1 hit.
HAMAPMF_00458. PSI_PsaA.
InterProIPR006243. PSI_PsaA.
IPR001280. PSI_PsaA/B.
IPR020586. PSI_PsaA/B_CS.
[Graphical view]
PfamPF00223. PsaA_PsaB. 1 hit.
[Graphical view]
PIRSFPIRSF002905. PSI_A. 1 hit.
PRINTSPR00257. PHOTSYSPSAAB.
SUPFAMSSF81558. SSF81558. 1 hit.
TIGRFAMsTIGR01335. psaA. 1 hit.
PROSITEPS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry namePSAA_AGRST
AccessionPrimary (citable) accession number: A1EA08
Entry history
Integrated into UniProtKB/Swiss-Prot: February 6, 2007
Last sequence update: January 23, 2007
Last modified: April 16, 2014
This is version 36 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families