Protein: Photosystem I assembly factor PSA3, chloroplastic (Protein PHOTOSYSTEM I ASSEMBLY 3) (Protein PIGMENT DEFECTIVE 329) (Q9M3C6)
Organism: Arabidopsis thaliana (Mouse-ear cress)
Function: Nuclear genome-encoded factor required for the accumulation of photosystem I (PSI). Functions as PSI biogenesis factor. Cooperates with PYG7 to promote the stable assembly of PSI in the thylakoid membrane. May target primarily the PsaC subunit. Does not seem to be required for the expression of chloroplast genes encoding PSI subunits.
Subcellular location: Plastid, chloroplast {ECO:0000269|PubMed:28522455}. Plastid, chloroplast thylakoid membrane {ECO:0000250|UniProtKB:B4FSG1}; Peripheral membrane protein {ECO:0000250|UniProtKB:B4FSG1}. Note=Associates with the stromal face of the thylakoid membrane. {ECO:0000250|UniProtKB:B4FSG1}.
Sequence: MVVVTHISTSFHQISPSFFHLRLRNPSTTSSSRPKLDGGFALSIRAYIEKPNSFSTFANKVIGSLPVIGLLARIISDEGGVGRDLVDFAEFRKRVGNKCTPDDSRAFYEFQQRRGKAGEPLYVLLCCWVAAVGAGLLKSEEILEGVTRVSISNDLEFEEQNFIALMTEARQRRAKLNIDAPTIPMELRVEKALEGIYACCFRRGLIEEEDEKLLKVMLIAVFPSVEKSEIERIIKEKATRVEEGGEEENVMAKRLPKEAIQMQMKDLEFLQQQNIES
InterPro domains: - IPR037736: Photosystem I assembly factor PSA3 (family) [6-274]
Interaction partners: - Tetratricopeptide repeat domain-containing protein PYG7, chloroplastic
- Protein PHOTOSYSTEM I ASSEMBLY 2, chloroplastic
- Carboxylesterase SOBER1
- Protein IQ-DOMAIN 31
- Ycf3-interacting protein 1, chloroplastic
- Probable carboxylesterase SOBER1-like
- F-box/kelch-repeat protein At5g39560
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0003824 (catalytic activity), GO:0097159 (organic cyclic compound binding), GO:1901363 (heterocyclic compound binding), GO:0005515 (protein binding), GO:0016491 (oxidoreductase activity), GO:0003676 (nucleic acid binding), GO:0004497 (monooxygenase activity), GO:0016705 (oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen), GO:0003723 (RNA binding), GO:0016709 (oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, NAD(P)H as one donor, and incorporation of one atom of oxygen), GO:0003729 (mRNA binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0071840 (cellular component organization or biogenesis), GO:0044237 (cellular metabolic process), GO:0016043 (cellular component organization), GO:0006091 (generation of precursor metabolites and energy), GO:0015979 (photosynthesis), GO:0044085 (cellular component biogenesis), GO:0019684 (photosynthesis, light reaction), GO:0043933 (protein-containing complex organization), GO:0022607 (cellular component assembly), GO:0065003 (protein-containing complex assembly)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005737 (cytoplasm), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0009536 (plastid), GO:0009507 (chloroplast), GO:0043231 (intracellular membrane-bounded organelle)