apoprotein

General Information (Source: NCBI Gene,UniProt)

Text mining Term apoprotein
UniProt ID PSAB_CUSSA
Name PSI-B
Photosystem I P700 chlorophyll a apoprotein A2
PsaB
Gene Names psaB
Taxonomy Cuscuta sandwichiana

General annotation

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.
Subcellular location Plastid membrane; Multi-pass membrane protein (By similarity).

Gene Ontology

GO:0051539 4 iron, 4 sulfur cluster binding MF
GO:0046872 metal ion binding MF
GO:0015979 photosynthesis BP
GO:0006810 transport BP
GO:0042170 plastid membrane CC
GO:0022900 electron transport chain BP
GO:0009522 photosystem I CC
GO:0016168 chlorophyll binding MF
GO:0018298 protein-chromophore linkage BP
GO:0016021 integral to membrane CC

Sequence

>gi|122219010|sp|Q49CB2.1|PSAB_CUSSA RecName: Full=Photosystem I P700 chlorophyll a apoprotein A2; AltName: Full=PSI-B; AltName: Full=PsaB
MVLRFPKFSQSLAQDPTTRRIWFGIATAHDFESHNEITEERLYQNIFASHFGQLAIIFLWTSGNLFHVAW
EGNFESWVQDPLHVRPIAHAIWDPHFGQPAVETFTRGGAVDPVNIAYSGVYQWWYTIGLRTKEDLYTGAL
FLFLISAISLIAGWLHLQPKWKPNIAWFKNAESRLNHHLAGLFGVSSLAWTGHLVHVAIPASRGEYVRWN
NLLDQLPHPQGLGPLFTGQWNLYAQNPDSSSHCFGTSQGAGTAILTFLGGFHPETQSLWLTDIAHHHLAI
TLLFFVAGHMYRTNFGIGHSLKNLLDAHIPPGGRLGRGHQGLYDTLNNSLHFQLGLALASLGVFTSLVAQ
HMYSLPSYAFIAQDFTTQAALYAHHQYIAGFIMTGAFAHGAIFFIRDYNPEQNKDNVLARILDHKQAIIS
HLSWVSLFLGFHTLGLYIHNDVMLAFGTPEKQILIEPIFAQWIQSAHGKTSYGFDVLLSSTNGPAVNAGQ
HLWLPEWLKAVNDTSNSLFLTIGPGDFLVHHAIALGLHTTTLILVKGALDARGSTLMPDKKEFGYSFPCD
GPGRGGTCDISAWDAFYLAVFWMLNTIGWVTFYWHWKHLTLWQDNVSQFNESSTYLMGWLRDYLWLNSSQ
LINGYNPFGMNSLSVWAWMFLFGHLVWATGFMFLISWRGYWQELIETLVWAHERTPLANLIHWRDKPVAL
SIVQARFVGLAHFSVGYIFTYAAFLIASTSGKFG

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Database Cross Reference

Ensembl Gene
UniGene
PDB
RefSeq
Pfam PF00223