PHCA_NEOHI
ID PHCA_NEOHI Reviewed; 162 AA.
AC Q0ZHI5;
DT 06-FEB-2007, integrated into UniProtKB/Swiss-Prot.
DT 22-AUG-2006, sequence version 1.
DT 03-AUG-2022, entry version 48.
DE RecName: Full=C-phycocyanin alpha chain;
GN Name=cpcA;
OS Neoporphyra haitanensis (Red seaweed) (Porphyra haitanensis).
OG Plastid; Chloroplast.
OC Eukaryota; Rhodophyta; Bangiophyceae; Bangiales; Bangiaceae; Neoporphyra.
OX NCBI_TaxID=1262161;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA Zuo Z.-H., Yan G.-L., Xu S.-Y., Chen Y.-X.;
RT "Cloning and sequence analysis of phycocyanin gene of Porphyra
RT haitanensis.";
RL Submitted (MAR-2006) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Light-harvesting photosynthetic bile pigment-protein from the
CC phycobiliprotein complex (phycobilisome, PBS). Phycocyanin is the major
CC phycobiliprotein in the PBS rod.
CC -!- SUBUNIT: Heterodimer of an alpha and a beta subunit, which further
CC assembles into trimers and the trimers into hexamers. The basic
CC functional unit of phycobiliproteins is a ring-shaped hexamer formed
CC from two back-to-back trimers contacting via the alpha chain subunits.
CC The trimers are composed of alpha/beta subunit heterodimers arranged
CC around a three-fold axis of symmetry. The phycoerythrins also contain a
CC gamma subunit which is located in the center of the hexamer.
CC {ECO:0000250|UniProtKB:P00306}.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC {ECO:0000250}; Peripheral membrane protein {ECO:0000250}; Stromal side
CC {ECO:0000250}. Note=Part of the phycobilisome rod. {ECO:0000250}.
CC -!- PTM: Contains one covalently linked phycocyanobilin chromophore.
CC {ECO:0000250|UniProtKB:P00306}.
CC -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR EMBL; DQ449071; ABE27596.1; -; Genomic_DNA.
DR RefSeq; YP_007947908.1; NC_021189.1.
DR AlphaFoldDB; Q0ZHI5; -.
DR SMR; Q0ZHI5; -.
DR GeneID; 15525424; -.
DR GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0030089; C:phycobilisome; IEA:UniProtKB-KW.
DR GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR Gene3D; 1.10.490.20; -; 1.
DR InterPro; IPR009050; Globin-like_sf.
DR InterPro; IPR012128; Phycobilisome_asu/bsu.
DR InterPro; IPR038719; Phycobilisome_asu/bsu_sf.
DR InterPro; IPR006246; Phycocyanin_a.
DR Pfam; PF00502; Phycobilisome; 1.
DR PIRSF; PIRSF000081; Phycocyanin; 1.
DR SUPFAM; SSF46458; SSF46458; 1.
DR TIGRFAMs; TIGR01338; phycocy_alpha; 1.
PE 3: Inferred from homology;
KW Antenna complex; Bile pigment; Chloroplast; Chromophore;
KW Electron transport; Membrane; Photosynthesis; Phycobilisome; Plastid;
KW Thylakoid; Transport.
FT CHAIN 1..162
FT /note="C-phycocyanin alpha chain"
FT /id="PRO_0000277333"
FT BINDING 84
FT /ligand="(2R,3E)-phycocyanobilin"
FT /ligand_id="ChEBI:CHEBI:85275"
FT /note="covalent, via 1 link"
FT /evidence="ECO:0000250|UniProtKB:P00306"
SQ SEQUENCE 162 AA; 17464 MW; D5744AF076490A02 CRC64;
MKTPITEAIA SADSQGRFLS NGELQAINGR YQRAAASLGA ARSLTNNAQR LITGAAQSVY
TKFPYVTQMP GPTYASSAIG KAKCARDIGY YLRMVTYCLV VGATGPMDEY LVAGLEEINR
SFELSPSWYV EALQYIKGSH GLSGQIGNEA NVYLDYAINT LS