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PHEB_GRIMO
ID   PHEB_GRIMO              Reviewed;         177 AA.
AC   O36004;
DT   15-JUL-1999, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1998, sequence version 1.
DT   03-AUG-2022, entry version 93.
DE   RecName: Full=R-phycoerythrin beta chain;
GN   Name=cpeB;
OS   Griffithsia monilis (Red alga).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Florideophyceae; Rhodymeniophycidae; Ceramiales;
OC   Ceramiaceae; Griffithsia.
OX   NCBI_TaxID=42003;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], X-RAY CRYSTALLOGRAPHY (1.9 ANGSTROMS) IN
RP   COMPLEX WITH PHYCOERYTHROBILIN; PHYCOUROBILIN AND CPEA, SUBUNIT, AND
RP   METHYLATION AT ASN-72.
RX   PubMed=10388620; DOI=10.1006/jsbi.1999.4106;
RA   Ritter S., Hiller R.G., Wrench P.M., Welte W., Diederichs K.;
RT   "Crystal structure of a phycourobilin-containing phycoerythrin at 1.90-A
RT   resolution.";
RL   J. Struct. Biol. 126:86-97(1999).
CC   -!- FUNCTION: Light-harvesting photosynthetic tetrapyrrole chromophore-
CC       protein from the phycobiliprotein complex.
CC   -!- SUBUNIT: Heterododecamer of 6 alpha and 6 beta chains. 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:0000269|PubMed:10388620}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000250}; Peripheral membrane protein {ECO:0000250}; Stromal side
CC       {ECO:0000250}. Note=Forms the periphery of the phycobilisome rod.
CC       {ECO:0000250}.
CC   -!- PTM: Contains two covalently linked phycoerythrobilin chromophores and
CC       one covalently linked phycourobilin chromophore.
CC   -!- MISCELLANEOUS: The light-harvesting antenna system in red algae and
CC       cyanobacteria is formed of phycobilisomes. These are composed of the
CC       phycobiliproteins phycoerythrin (CPE), phycocyanin (CPC) and
CC       allophycocyanin (APC). Cyanobacteria also contain phycoerythrocyanin
CC       (PCC). The phycobiliproteins all share the same subunit composition and
CC       organization with variations in the covalently bound open-chain
CC       tetrapyrrole chromophores. The phycobiliprotein complexes are arranged
CC       sequentially in antenna complexes linked by linker proteins with CPE at
CC       the periphery, CPC in the middle and APC at the core feeding to the
CC       photosynthetic reaction center.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; Z98528; CAB11028.1; -; Genomic_DNA.
DR   PDB; 1B8D; X-ray; 1.90 A; B/L=1-177.
DR   PDBsum; 1B8D; -.
DR   AlphaFoldDB; O36004; -.
DR   SMR; O36004; -.
DR   iPTMnet; O36004; -.
DR   PRIDE; O36004; -.
DR   EvolutionaryTrace; O36004; -.
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   Pfam; PF00502; Phycobilisome; 1.
DR   PIRSF; PIRSF000081; Phycocyanin; 1.
DR   SUPFAM; SSF46458; SSF46458; 1.
PE   1: Evidence at protein level;
KW   3D-structure; Antenna complex; Bile pigment; Chloroplast; Chromophore;
KW   Electron transport; Membrane; Methylation; Photosynthesis; Phycobilisome;
KW   Plastid; Thylakoid; Transport.
FT   CHAIN           1..177
FT                   /note="R-phycoerythrin beta chain"
FT                   /id="PRO_0000199191"
FT   BINDING         35
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000269|PubMed:10388620"
FT   BINDING         39
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000269|PubMed:10388620"
FT   BINDING         50
FT                   /ligand="phycourobilin"
FT                   /ligand_id="ChEBI:CHEBI:189062"
FT                   /note="covalent, via 2 links"
FT                   /evidence="ECO:0000269|PubMed:10388620"
FT   BINDING         54
FT                   /ligand="phycourobilin"
FT                   /ligand_id="ChEBI:CHEBI:189062"
FT                   /evidence="ECO:0000269|PubMed:10388620"
FT   BINDING         61
FT                   /ligand="phycourobilin"
FT                   /ligand_id="ChEBI:CHEBI:189062"
FT                   /note="covalent, via 2 links"
FT                   /evidence="ECO:0000269|PubMed:10388620"
FT   BINDING         72
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000269|PubMed:10388620"
FT   BINDING         77..78
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="1"
FT   BINDING         82
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="1"
FT                   /note="covalent, via 1 link"
FT                   /evidence="ECO:0000269|PubMed:10388620"
FT   BINDING         84..85
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="1"
FT   BINDING         147..148
FT                   /ligand="phycourobilin"
FT                   /ligand_id="ChEBI:CHEBI:189062"
FT   BINDING         158
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="2"
FT                   /note="covalent, via 1 link"
FT                   /evidence="ECO:0000269|PubMed:10388620"
FT   MOD_RES         72
FT                   /note="N4-methylasparagine"
FT                   /evidence="ECO:0000269|PubMed:10388620"
FT   HELIX           4..13
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   TURN            14..16
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   HELIX           22..32
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   HELIX           34..46
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   HELIX           48..62
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   HELIX           64..67
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   HELIX           76..99
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   HELIX           103..108
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   TURN            109..112
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   HELIX           113..120
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   HELIX           124..142
FT                   /evidence="ECO:0007829|PDB:1B8D"
FT   HELIX           159..176
FT                   /evidence="ECO:0007829|PDB:1B8D"
SQ   SEQUENCE   177 AA;  18482 MW;  73B87ACD8A165B52 CRC64;
     MLDAFSRVVV TSDAKAAYVG GSDLQSLKSF INDGNKRLDA VNYIVSNASC IVSDAVSGMI
     CENPGLIAPG GNCYTNRRMA ACLRDGEIIL RYVSYALLAG DSSVLDDRCL NGLKETYIAL
     GVPTASSSRA VSIMKATATA FITNTASGRK VEVAAGDCQA LQAEAASYFD KVGSSID
 
 
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