CB120_HORVU
ID CB120_HORVU Reviewed; 231 AA.
AC Q36718;
DT 20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1996, sequence version 1.
DT 03-AUG-2022, entry version 84.
DE RecName: Full=Chlorophyll a-b binding protein 1B-20, chloroplastic;
DE AltName: Full=LHCI type I CAB-1B-20;
DE AltName: Full=Light-harvesting complex I 20 kDa protein;
DE Flags: Precursor; Fragment;
GN Name=LHC Ib-20;
OS Hordeum vulgare (Barley).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; Liliopsida; Poales; Poaceae; BOP clade;
OC Pooideae; Triticodae; Triticeae; Hordeinae; Hordeum.
OX NCBI_TaxID=4513;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA], PROTEIN SEQUENCE OF 32-48, AND INDUCTION BY
RP LIGHT.
RX PubMed=8278496; DOI=10.1104/pp.101.1.227;
RA Anandan S., Morishige D.T., Thornber J.P.;
RT "Light-induced biogenesis of light-harvesting complex I (LHC I) during
RT chloroplast development in barley (Hordeum vulgare). Studies using cDNA
RT clones of the 21- and 20-kilodalton LHC I apoproteins.";
RL Plant Physiol. 101:227-236(1993).
CC -!- FUNCTION: The light-harvesting complex (LHC) functions as a light
CC receptor, it captures and delivers excitation energy to photosystems
CC with which it is closely associated. {ECO:0000250}.
CC -!- COFACTOR:
CC Note=Binds at least 14 chlorophylls (8 Chl-a and 6 Chl-b) and
CC carotenoids such as lutein and neoxanthin. {ECO:0000250};
CC -!- SUBUNIT: The LHC complex consists of chlorophyll a-b binding proteins.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC {ECO:0000305}; Single-pass membrane protein {ECO:0000305}.
CC -!- INDUCTION: By light. {ECO:0000269|PubMed:8278496}.
CC -!- PTM: Photoregulated by reversible phosphorylation of its threonine
CC residues. {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the light-harvesting chlorophyll a/b-binding
CC (LHC) protein family. {ECO:0000305}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; S68729; AAB29486.1; -; mRNA.
DR PIR; PQ0766; PQ0766.
DR AlphaFoldDB; Q36718; -.
DR SMR; Q36718; -.
DR PRIDE; Q36718; -.
DR ExpressionAtlas; Q36718; baseline and differential.
DR GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0009522; C:photosystem I; IEA:UniProtKB-KW.
DR GO; GO:0009523; C:photosystem II; IEA:UniProtKB-KW.
DR GO; GO:0016168; F:chlorophyll binding; IEA:UniProtKB-KW.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0009765; P:photosynthesis, light harvesting; IEA:InterPro.
DR InterPro; IPR001344; Chloro_AB-bd_pln.
DR InterPro; IPR022796; Chloroa_b-bind.
DR PANTHER; PTHR21649; PTHR21649; 1.
DR Pfam; PF00504; Chloroa_b-bind; 1.
PE 1: Evidence at protein level;
KW Chlorophyll; Chloroplast; Chromophore; Direct protein sequencing;
KW Magnesium; Membrane; Metal-binding; Phosphoprotein; Photosynthesis;
KW Photosystem I; Photosystem II; Plastid; Thylakoid; Transit peptide;
KW Transmembrane; Transmembrane helix.
FT TRANSIT <1..31
FT /note="Chloroplast"
FT /evidence="ECO:0000269|PubMed:8278496"
FT CHAIN 32..231
FT /note="Chlorophyll a-b binding protein 1B-20,
FT chloroplastic"
FT /id="PRO_0000337295"
FT TRANSMEM 183..199
FT /note="Helical"
FT /evidence="ECO:0000255"
FT REGION 1..25
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 36
FT /ligand="chlorophyll b"
FT /ligand_id="ChEBI:CHEBI:61721"
FT /ligand_label="1"
FT /ligand_part="Mg"
FT /ligand_part_id="ChEBI:CHEBI:25107"
FT /note="axial binding residue"
FT /evidence="ECO:0000250"
FT BINDING 56
FT /ligand="chlorophyll a"
FT /ligand_id="ChEBI:CHEBI:58416"
FT /ligand_label="1"
FT /evidence="ECO:0000250"
FT BINDING 80
FT /ligand="chlorophyll b"
FT /ligand_id="ChEBI:CHEBI:61721"
FT /ligand_label="2"
FT /evidence="ECO:0000250"
FT BINDING 118
FT /ligand="chlorophyll b"
FT /ligand_id="ChEBI:CHEBI:61721"
FT /ligand_label="3"
FT /evidence="ECO:0000250"
FT BINDING 133
FT /ligand="chlorophyll b"
FT /ligand_id="ChEBI:CHEBI:61721"
FT /ligand_label="3"
FT /ligand_part="Mg"
FT /ligand_part_id="ChEBI:CHEBI:25107"
FT /note="axial binding residue"
FT /evidence="ECO:0000250"
FT BINDING 136
FT /ligand="chlorophyll b"
FT /ligand_id="ChEBI:CHEBI:61721"
FT /ligand_label="4"
FT /evidence="ECO:0000250"
FT BINDING 182
FT /ligand="chlorophyll a"
FT /ligand_id="ChEBI:CHEBI:58416"
FT /ligand_label="5"
FT /evidence="ECO:0000250"
FT BINDING 183
FT /ligand="chlorophyll a"
FT /ligand_id="ChEBI:CHEBI:58416"
FT /ligand_label="3"
FT /ligand_part="Mg"
FT /ligand_part_id="ChEBI:CHEBI:25107"
FT /note="axial binding residue"
FT /evidence="ECO:0000250"
FT BINDING 186
FT /ligand="chlorophyll a"
FT /ligand_id="ChEBI:CHEBI:58416"
FT /ligand_label="4"
FT /ligand_part="Mg"
FT /ligand_part_id="ChEBI:CHEBI:25107"
FT /note="axial binding residue"
FT /evidence="ECO:0000250"
FT BINDING 188
FT /ligand="chlorophyll a"
FT /ligand_id="ChEBI:CHEBI:58416"
FT /ligand_label="1"
FT /evidence="ECO:0000250"
FT BINDING 200
FT /ligand="chlorophyll a"
FT /ligand_id="ChEBI:CHEBI:58416"
FT /ligand_label="5"
FT /ligand_part="Mg"
FT /ligand_part_id="ChEBI:CHEBI:25107"
FT /note="axial binding residue"
FT /evidence="ECO:0000250"
FT BINDING 215
FT /ligand="chlorophyll a"
FT /ligand_id="ChEBI:CHEBI:58416"
FT /ligand_label="6"
FT /ligand_part="Mg"
FT /ligand_part_id="ChEBI:CHEBI:25107"
FT /note="axial binding residue"
FT /evidence="ECO:0000250"
FT NON_TER 1
SQ SEQUENCE 231 AA; 25674 MW; D90E6EECD47261DB CRC64;
RIQAYRFRTR VPPSPAASGS PRSTRRDVAV QAKGSWLPGL QSPAYLDGSL EGDNGFDPLA
LAEDPEDLRW FVQADVVNGR WAMLGVAGML IPEVLTKAGL MNAPEWLRLP GKETYFASSS
TALRVHMSST YVEIRRWQDI KNPGSVNQDP IFKSYSLPPH ECGYPGRVFN PLNFAPLENK
EKELANGRLA MLAFLGFLVQ HNVHGKGPFE NLQQHLADPW HNTIIQTISG Q
