Photosystem I P700 chlorophyll a apoprotein A2 - Amphidinium carterae (Dinoflagellate)

Contribute

Send feedback

Read comments (?) or add your own

P58383 (PSAB_AMPCA) Reviewed, UniProtKB/Swiss-Prot

Last modified April 3, 2013. Version 65. History...

Clusters with 100%, 90%, 50% identity |

Documents (1) |

Third-party data

text xml rdf/xml gff fasta

Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·Documents Customize order

Names and origin

Protein names

Recommended name:
Photosystem I P700 chlorophyll a apoprotein A2
EC=1.97.1.12

Alternative name(s):
PSI-B
PsaB

Gene names

Name:

psaB

Encoded on

Plastid; Chloroplast

Organism

Amphidinium carterae (Dinoflagellate)

Taxonomic identifier

2961 [NCBI]

Taxonomic lineage

Eukaryota › Alveolata › Dinophyceae › Gymnodiniales › Gymnodiniaceae › Amphidinium

Protein attributes

Sequence length	644 AA.
Sequence status	Complete.
Protein existence	Inferred 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/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 By similarity. HAMAP-Rule MF_00482
Catalytic activity	Reduced plastocyanin + oxidized ferredoxin + light = oxidized plastocyanin + reduced ferredoxin. HAMAP-Rule MF_00482
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	Plastid › chloroplast thylakoid membrane; Multi-pass membrane protein By similarity HAMAP-Rule MF_00482.
Sequence similarities	Belongs to the PsaA/PsaB family.

Ontologies

Keywords
Biological process	Electron transport Photosynthesis Transport
Cellular component	Chloroplast Membrane Photosystem I Plastid Thylakoid
Domain	Transmembrane Transmembrane helix
Ligand	4Fe-4S Chlorophyll Chromophore Iron Iron-sulfur Magnesium Metal-binding
Molecular function	Oxidoreductase
Gene Ontology (GO)
Biological_process	electron transport chain Inferred from electronic annotation. Source: UniProtKB-KW photosynthesis Inferred from electronic annotation. Source: UniProtKB-KW protein-chromophore linkage Inferred from electronic annotation. Source: UniProtKB-KW
Cellular_component	chloroplast thylakoid membrane Inferred from electronic annotation. Source: UniProtKB-SubCell integral to membrane Inferred from electronic annotation. Source: UniProtKB-KW photosystem I Inferred from electronic annotation. Source: UniProtKB-KW
Molecular_function	4 iron, 4 sulfur cluster binding Inferred from electronic annotation. Source: UniProtKB-KW chlorophyll binding Inferred from electronic annotation. Source: UniProtKB-KW metal ion binding Inferred from electronic annotation. Source: UniProtKB-KW oxidoreductase activity Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

Feature key

Position(s)

Length

Description

Graphical view

Feature identifier

Molecule processing

Chain

1 – 644

644

Photosystem I P700 chlorophyll a apoprotein A2 HAMAP-Rule MF_00482

PRO_0000088601

Regions

Transmembrane

58 – 81

Helical; Name=I; Potential

Transmembrane

140 – 160

Helical; Name=II; Potential

Transmembrane

166 – 190

Helical; Name=III; Potential

Transmembrane

231 – 249

Helical; Name=IV; Potential

Transmembrane

264 – 287

Helical; Name=V; Potential

Transmembrane

303 – 329

Helical; Name=VI; Potential

Transmembrane

348 – 370

Helical; Name=VII; Potential

Transmembrane

429 – 447

Helical; Name=VIII; Potential

Transmembrane

487 – 508

Helical; Name=IX; Potential

Transmembrane

555 – 577

Helical; Name=X; Potential

Transmembrane

621 – 641

Helical; Name=XI; Potential

Sites

Metal binding

471

Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity

Metal binding

480

Iron-sulfur (4Fe-4S); shared with dimeric partner By similarity

Metal binding

566

Magnesium (chlorophyll-a B1 axial ligand; P700 special pair) By similarity

Metal binding

574

Magnesium (chlorophyll-a B3 axial ligand) By similarity

Binding site

582

Chlorophyll-a B3 By similarity

Binding site

583

Phylloquinone B By similarity

Sequences

Sequence

Length

Mass (Da)

Tools

P58383 [UniParc].

Last modified December 6, 2002. Version 2.
Checksum: 140796C76EBA65D6
Show »

FASTA

644

70,711

        10         20         30         40         50         60 
MGTVFSRLFQ SVLLVCPIKR VSIRLGSYGR CATQRYFQVL GNIHDIELNE SLNSPQAIQA 

        70         80         90        100        110        120 
LSFGQLSVIL LWLAAYTFHI GWSGNFEAFI DNPLGVQPIN HFVLDPHYSQ YKVDTTIAAL 

       130        140        150        160        170        180 
ANHPIYHWLM TVGFTSNAQI YRFTLGLEIT AAVMLVLSLA PSVGLLSMGG LEVVSWISIC 

       190        200        210        220        230        240 
WAGHLVNFAP GAANLTNVVM EGPGSLGNLM NVLTFNGGIQ LDTQALAVSD VAHHHVAIGI 

       250        260        270        280        290        300 
VGLWISALLR VSKYAWNFNT QSSYHLDLSL SLTVGGILTS LLAQQAYVYP ALSYLPYDYL 

       310        320        330        340        350        360 
ATTSLYVHHQ YIGAFLATGG FVHGGIFLVR DYTLSNDLVG KLLATKATVI STLSWITLFL 

       370        380        390        400        410        420 
GFHATGLYMH NDAMAAFGVP QKQIIIEPVF AEFIQQVFFL GTPVYGLGSA AVSSTPTLSF 

       430        440        450        460        470        480 
LPIISGGDFL VHHAIALGLH TTVLVLIKGA LDSQGSYLFP DKQSFGYGFA CDGPGRGGTC 

       490        500        510        520        530        540 
DISTWDSFYL AFFWVNNTVA WFTYYFHWKV LSLWQSSTAV SDEDSLYLMG WFRDYLWQNC 

       550        560        570        580        590        600 
AALLSGYDSL GSNDLAVWAW AFLLAHLAWA TGFMFLISWR GYWQELIDTV IYMHLKAQAR 

       610        620        630        640 
FIGLAADVVT PVALSIVQAR FIGLAHYVAG FILTYHAFVV GATS

« Hide

References

[1]	"'Empty' minicircles and petB/atpA and psbD/psbE (cytb559 alpha) genes in tandem in Amphidinium carterae plastid DNA." Hiller R.G. FEBS Lett. 505:449-452(2001) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]. Strain: CS21.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AJ311629 Genomic DNA. Translation: CAC34542.2.
3D structure databases
ProteinModelPortal	P58383.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Family and domain databases
Gene3D	1.20.1130.10. 1 hit.
HAMAP	MF_00482. PSI_PsaB. Divergent sequence.
InterPro	IPR001280. PSI_PsaA/B. IPR020586. PSI_PsaA/B_CS. [Graphical view]
Pfam	PF00223. PsaA_PsaB. 1 hit. [Graphical view]
PROSITE	PS00419. PHOTOSYSTEM_I_PSAAB. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

PSAB_AMPCA

Accession

Primary (citable) accession number: P58383

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 16, 2001
Last sequence update:	December 6, 2002
Last modified:	April 3, 2013
This is version 65 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Relevant documents

SIMILARITY comments

Index of protein domains and families

Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·Documents

Preferred order of sections

Names and origin

Protein attributes

General annotation (Comments)

Ontologies

Sequence annotation (Features)

Molecule processing

Regions

Sites

Sequences

References

Cross-references

Sequence databases

3D structure databases

Protocols and materials databases

Family and domain databases

Entry information

Relevant documents