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Protein

Chlorophyll a-b binding protein 1B-20, chloroplastic

Gene

LHC Ib-20

Organism
Hordeum vulgare (Barley)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated.By similarity

Cofactori

Note: Binds at least 14 chlorophylls (8 Chl-a and 6 Chl-b) and carotenoids such as lutein and neoxanthin.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi36Magnesium (chlorophyll-b 1 axial ligand); via carbonyl oxygenBy similarity1
Binding sitei56Chlorophyll-a 1; via amide nitrogenBy similarity1
Binding sitei80Chlorophyll-b 2By similarity1
Binding sitei118Chlorophyll-b 3By similarity1
Metal bindingi133Magnesium (chlorophyll-b 3 axial ligand)By similarity1
Binding sitei136Chlorophyll-b 4By similarity1
Binding sitei182Chlorophyll-a 5By similarity1
Metal bindingi183Magnesium (chlorophyll-a 3 axial ligand)By similarity1
Metal bindingi186Magnesium (chlorophyll-a 4 axial ligand)By similarity1
Binding sitei188Chlorophyll-a 1By similarity1
Metal bindingi200Magnesium (chlorophyll-a 5 axial ligand)By similarity1
Metal bindingi215Magnesium (chlorophyll-a 6 axial ligand)By similarity1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Biological processPhotosynthesis
LigandChlorophyll, Chromophore, Magnesium, Metal-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Chlorophyll a-b binding protein 1B-20, chloroplastic
Alternative name(s):
LHCI type I CAB-1B-20
Light-harvesting complex I 20 kDa protein
Gene namesi
Name:LHC Ib-20
OrganismiHordeum vulgare (Barley)
Taxonomic identifieri4513 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaPoalesPoaceaeBOP cladePooideaeTriticodaeTriticeaeHordeinaeHordeum

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cell wall Cytoskeleton Vacuole Chloroplast Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertion Graphics by Christian Stolte; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei183 – 199HelicalSequence analysisAdd BLAST17

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem I, Photosystem II, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transit peptidei‹1 – 31Chloroplast1 PublicationAdd BLAST›31
ChainiPRO_000033729532 – 231Chlorophyll a-b binding protein 1B-20, chloroplasticAdd BLAST200

Post-translational modificationi

Photoregulated by reversible phosphorylation of its threonine residues.By similarity

Keywords - PTMi

Phosphoprotein

Proteomic databases

PRIDEiQ36718

Expressioni

Inductioni

By light.1 Publication

Gene expression databases

ExpressionAtlasiQ36718 baseline and differential

Interactioni

Subunit structurei

The LHC complex consists of chlorophyll a-b binding proteins.

Structurei

3D structure databases

ProteinModelPortaliQ36718
SMRiQ36718
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Transit peptide, Transmembrane, Transmembrane helix

Family and domain databases

Gene3Di1.10.3460.10, 1 hit
InterProiView protein in InterPro
IPR001344 Chloro_AB-bd_pln
IPR022796 Chloroa_b-bind
IPR023329 Chlorophyll_a/b-bd_dom_sf
PANTHERiPTHR21649 PTHR21649, 1 hit
PfamiView protein in Pfam
PF00504 Chloroa_b-bind, 1 hit

Sequencei

Sequence statusi: Fragment.

Sequence processingi: The displayed sequence is further processed into a mature form.

Q36718-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
RIQAYRFRTR VPPSPAASGS PRSTRRDVAV QAKGSWLPGL QSPAYLDGSL
60 70 80 90 100
EGDNGFDPLA LAEDPEDLRW FVQADVVNGR WAMLGVAGML IPEVLTKAGL
110 120 130 140 150
MNAPEWLRLP GKETYFASSS TALRVHMSST YVEIRRWQDI KNPGSVNQDP
160 170 180 190 200
IFKSYSLPPH ECGYPGRVFN PLNFAPLENK EKELANGRLA MLAFLGFLVQ
210 220 230
HNVHGKGPFE NLQQHLADPW HNTIIQTISG Q
Length:231
Mass (Da):25,674
Last modified:November 1, 1996 - v1
Checksum:iD90E6EECD47261DB
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Non-terminal residuei11

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
S68729 mRNA Translation: AAB29486.1
PIRiPQ0766

Similar proteinsi

Entry informationi

Entry nameiCB120_HORVU
AccessioniPrimary (citable) accession number: Q36718
Entry historyiIntegrated into UniProtKB/Swiss-Prot: May 20, 2008
Last sequence update: November 1, 1996
Last modified: May 23, 2018
This is version 76 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Direct protein sequencing

Documents

  1. SIMILARITY comments
    Index of protein domains and families

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