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A2C4V3

- PSAA_PROM1

UniProt

A2C4V3 - PSAA_PROM1

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Protein

Photosystem I P700 chlorophyll a apoprotein A1

Gene

psaA

Organism
Prochlorococcus marinus (strain NATL1A)
Status
Reviewed - Annotation score: 3 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/cytochrome c6-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 or cytochrome c6.UniRule annotation

Catalytic activityi

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

Cofactori

PSI electron transfer chain: 5 divinyl chlorophyll a, 1 divinyl chlorophyll a', 2 phylloquinones and 3 4Fe-4S clusters. PSI core antenna: 90 divinyl chlorophyll a, 22 carotenoids, 3 phospholipids and 1 galactolipid. P700 is a divinyl chlorophyll a/divinyl chlorophyll a' dimer, A0 is one or more divinyl 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 bindingi601 – 6011Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
Metal bindingi610 – 6101Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
Metal bindingi693 – 6931Magnesium (divinyl chlorophyll-a' A1 axial ligand; P700 special pair)UniRule annotation
Metal bindingi701 – 7011Magnesium (divinyl chlorophyll-a A3 axial ligand)UniRule annotation
Binding sitei709 – 7091Divinyl chlorophyll-a A3UniRule annotation
Binding sitei710 – 7101Phylloquinone AUniRule 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

Enzyme and pathway databases

BioCyciPMAR167555:GI3K-1998-MONOMER.

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem I P700 chlorophyll a apoprotein A1UniRule annotation (EC:1.97.1.12UniRule annotation)
Alternative name(s):
PsaAUniRule annotation
Gene namesi
Name:psaAUniRule annotation
Ordered Locus Names:NATL1_19571
OrganismiProchlorococcus marinus (strain NATL1A)
Taxonomic identifieri167555 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaProchloralesProchlorococcaceaeProchlorococcus
ProteomesiUP000002592: Chromosome

Subcellular locationi

Cellular thylakoid membrane UniRule annotation; Multi-pass membrane protein UniRule annotation

GO - Cellular componenti

  1. integral component of membrane Source: UniProtKB-KW
  2. photosystem I Source: UniProtKB-KW
  3. thylakoid membrane Source: UniProtKB-HAMAP
Complete GO annotation...

Keywords - Cellular componenti

Membrane, Photosystem I, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 768768Photosystem I P700 chlorophyll a apoprotein A1PRO_0000294204Add
BLAST

Interactioni

Subunit structurei

The PsaA/B heterodimer binds the P700 divinyl 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 cyanobacterial PSI reaction center is composed of one copy each of PsaA,B,C,D,E,F,I,J,K,L,M and X, and forms trimeric complexes.UniRule annotation

Protein-protein interaction databases

STRINGi167555.NATL1_19571.

Structurei

3D structure databases

ProteinModelPortaliA2C4V3.
SMRiA2C4V3. Positions 20-768.
ModBaseiSearch...
MobiDBiSearch...

Transmembrane

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei76 – 9924Helical; Name=IUniRule annotationAdd
BLAST
Transmembranei162 – 18524Helical; Name=IIUniRule annotationAdd
BLAST
Transmembranei201 – 22525Helical; Name=IIIUniRule annotationAdd
BLAST
Transmembranei310 – 32819Helical; Name=IVUniRule annotationAdd
BLAST
Transmembranei369 – 39224Helical; Name=VUniRule annotationAdd
BLAST
Transmembranei408 – 43427Helical; Name=VIUniRule annotationAdd
BLAST
Transmembranei456 – 47823Helical; Name=VIIUniRule annotationAdd
BLAST
Transmembranei559 – 57719Helical; Name=VIIIUniRule annotationAdd
BLAST
Transmembranei617 – 63822Helical; Name=IXUniRule annotationAdd
BLAST
Transmembranei682 – 70423Helical; Name=XUniRule annotationAdd
BLAST
Transmembranei742 – 76221Helical; Name=XIUniRule annotationAdd
BLAST

Family & Domainsi

Sequence similaritiesi

Belongs to the PsaA/PsaB family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiNOG05023.
HOGENOMiHOG000276868.
KOiK02689.
OMAiTWAFFHA.
OrthoDBiEOG60W7PS.

Family and domain databases

Gene3Di1.20.1130.10. 1 hit.
HAMAPiMF_00458. PSI_PsaA.
InterProiIPR006243. PSI_PsaA.
IPR001280. PSI_PsaA/B.
IPR020586. PSI_PsaA/B_CS.
[Graphical view]
PfamiPF00223. PsaA_PsaB. 1 hit.
[Graphical view]
PIRSFiPIRSF002905. PSI_A. 1 hit.
PRINTSiPR00257. PHOTSYSPSAAB.
SUPFAMiSSF81558. SSF81558. 1 hit.
TIGRFAMsiTIGR01335. psaA. 1 hit.
PROSITEiPS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

A2C4V3-1 [UniParc]FASTAAdd to Basket

« Hide

        10         20         30         40         50
MTISPPEKEQ KKEPVLDKPI ETDAIPVDFS KLDKPGFWSK SLAKGPKTTT
60 70 80 90 100
WIWNLHADAH DFDTHVGDLQ ETSRKVFSAH FGHLAVIFIW MSAAFFHGAR
110 120 130 140 150
FSNYSGWLSD PTHVKPGAQV VWPIVGQEML NADLGGNYHG IQITSGIFQM
160 170 180 190 200
WRGWGITNET ELMALAIGAL LMAAIMLHGG IYHYHKAAPK LDWFRNLESM
210 220 230 240 250
LNHHIAGLVG LGSIAWAGHC IHIGAPTAAL MDAIDAGKPL IIDGIPIASI
260 270 280 290 300
ADMPLPHELC NPAIASQIFP GLAGRTVENF FTTNWWAFSD FLTFKGGLNP
310 320 330 340 350
VTGSLWMTDI SHHHLAFGVL AVLGGHLYRT MFGIGHSLKE ILDNHAGDPI
360 370 380 390 400
LFPAPNGHKG IYEFLANSWH AQLGLNLAMI GSLSIIISHH MYAMPPYPYL
410 420 430 440 450
SIDYPTVLGL FTHHMWIGGL FIVGAAAHAG IAMIRDYDPA VHIDNVLDRI
460 470 480 490 500
LKARDALISH LNWACMFLGF HSFGLYIHND VMRALGRPAD MFSDTGIQLQ
510 520 530 540 550
PVFAQWIQNI HNSAAGSTTL AGANVNLQPG LVSEVFNGSV SQVGGKIGIA
560 570 580 590 600
PIPLGTADFM IHHIHAFTIH VTLLILLKGV LFARSSRLIP DKANLGFRFP
610 620 630 640 650
CDGPGRGGTC QVSSWDHVFL GLFWMYNGLS VVIFHFSWKM QSDVWGLTGG
660 670 680 690 700
NFAQSSITIN GWLRDFLWAQ SSQVLTSYGQ PISMYGLMFL GAHFVWAFSL
710 720 730 740 750
MFLFSGRGYW QELFESIIWA HNKLNLAPTI QPRALSITQG RAVGAAHFLL
760
GGIATTWAFF HARLIGLG
Length:768
Mass (Da):84,390
Last modified:February 20, 2007 - v1
Checksum:i5F51B544D4E4471E
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
CP000553 Genomic DNA. Translation: ABM76513.1.
RefSeqiWP_011824482.1. NC_008819.1.
YP_001015777.1. NC_008819.1.

Genome annotation databases

EnsemblBacteriaiABM76513; ABM76513; NATL1_19571.
GeneIDi4779260.
KEGGipme:NATL1_19571.
PATRICi23021569. VBIProMar31285_1998.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
CP000553 Genomic DNA. Translation: ABM76513.1 .
RefSeqi WP_011824482.1. NC_008819.1.
YP_001015777.1. NC_008819.1.

3D structure databases

ProteinModelPortali A2C4V3.
SMRi A2C4V3. Positions 20-768.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

STRINGi 167555.NATL1_19571.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

EnsemblBacteriai ABM76513 ; ABM76513 ; NATL1_19571 .
GeneIDi 4779260.
KEGGi pme:NATL1_19571.
PATRICi 23021569. VBIProMar31285_1998.

Phylogenomic databases

eggNOGi NOG05023.
HOGENOMi HOG000276868.
KOi K02689.
OMAi TWAFFHA.
OrthoDBi EOG60W7PS.

Enzyme and pathway databases

BioCyci PMAR167555:GI3K-1998-MONOMER.

Family and domain databases

Gene3Di 1.20.1130.10. 1 hit.
HAMAPi MF_00458. PSI_PsaA.
InterProi IPR006243. PSI_PsaA.
IPR001280. PSI_PsaA/B.
IPR020586. PSI_PsaA/B_CS.
[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 TIGR01335. psaA. 1 hit.
PROSITEi PS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
[Graphical view ]
ProtoNeti Search...

Publicationsi

  1. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: NATL1A.

Entry informationi

Entry nameiPSAA_PROM1
AccessioniPrimary (citable) accession number: A2C4V3
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 10, 2007
Last sequence update: February 20, 2007
Last modified: October 29, 2014
This is version 59 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3