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Protein

Chlorophyll a-b binding protein 16, chloroplastic

Gene

CAB16

Organism
Nicotiana tabacum (Common tobacco)
Status
Reviewed-Annotation score: -Experimental evidence at transcript 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.

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 bindingi58Magnesium (chlorophyll-b 1 axial ligand); via carbonyl oxygenBy similarity1
Binding sitei80Chlorophyll-a 1; via amide nitrogenBy similarity1
Binding sitei86Chlorophyll-a 1By similarity1
Metal bindingi99Magnesium (chlorophyll-a 1 axial ligand)By similarity1
Metal bindingi102Magnesium (chlorophyll-a 2 axial ligand)By similarity1
Binding sitei104Chlorophyll-b 2By similarity1
Binding sitei137Chlorophyll-a 3By similarity1
Binding sitei147Chlorophyll-a 3; via amide nitrogenBy similarity1
Metal bindingi153Magnesium (chlorophyll-b 2 axial ligand); via carbonyl oxygenBy similarity1
Binding sitei157Chlorophyll-b 3By similarity1
Binding sitei165Chlorophyll-b 4 or chlorophyll-b 5By similarity1
Metal bindingi173Magnesium (chlorophyll-b 3 axial ligand)By similarity1
Binding sitei176Chlorophyll-b 4By similarity1
Binding sitei182Chlorophyll-b 2; via amide nitrogenBy similarity1
Binding sitei213Chlorophyll-a 5By similarity1
Metal bindingi214Magnesium (chlorophyll-a 3 axial ligand)By similarity1
Metal bindingi217Magnesium (chlorophyll-a 4 axial ligand)By similarity1
Binding sitei219Chlorophyll-a 1By similarity1
Metal bindingi231Magnesium (chlorophyll-a 5 axial ligand)By similarity1
Metal bindingi246Magnesium (chlorophyll-a 6 axial ligand)By similarity1
Binding sitei255Chlorophyll-a 6; via amide nitrogenBy similarity1
Binding sitei262Chlorophyll-b 5; via carbonyl oxygenBy 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 16, chloroplastic
Alternative name(s):
LHCII type I CAB-16
Short name:
LHCP
Gene namesi
Name:CAB16
OrganismiNicotiana tabacum (Common tobacco)
Taxonomic identifieri4097 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaeasteridslamiidsSolanalesSolanaceaeNicotianoideaeNicotianeaeNicotiana
Proteomesi
  • UP000084051 Componenti: Genome assembly

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
Transmembranei100 – 120HelicalSequence analysisAdd BLAST21
Transmembranei152 – 172HelicalSequence analysisAdd BLAST21
Transmembranei220 – 240HelicalSequence analysisAdd BLAST21

Keywords - Cellular componenti

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

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transit peptidei1 – 34ChloroplastSequence analysisAdd BLAST34
ChainiPRO_000000370235 – 266Chlorophyll a-b binding protein 16, chloroplasticAdd BLAST232

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei35N2-acetylarginineBy similarity1
Modified residuei37PhosphothreonineBy similarity1

Post-translational modificationi

Photoregulated by reversible phosphorylation of its threonine residues.By similarity

Keywords - PTMi

Acetylation, Phosphoprotein

Proteomic databases

PRIDEiP27492

Interactioni

Subunit structurei

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

Structurei

3D structure databases

ProteinModelPortaliP27492
SMRiP27492
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domaini

The N-terminus of the protein extends into the stroma where it is involved with adhesion of granal membranes and post-translational modifications; both are believed to mediate the distribution of excitation energy between photosystems I and II.

Sequence similaritiesi

Keywords - Domaini

Transit peptide, Transmembrane, Transmembrane helix

Phylogenomic databases

KOiK08912

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: Complete.

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

P27492-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAASTTALSS PFAGKAVKLS PSSSEVTGNG KVTMRKTASK AKPVSSGSPW
60 70 80 90 100
YGPDRVKYLG PFSGESPSYL TGEFPGDYGW DTAGLSADPE TFAKNRELEV
110 120 130 140 150
IHCRWAMLGA LGCVFPELLA RNGVKFGEAV WFKAGSQIFS EGGLDYLGNP
160 170 180 190 200
SLVHAQSILA IWACQVVLMG AVEGYRVAGG PLGEVVDPLY PGGSFDPLGL
210 220 230 240 250
AEDPEAFAEL KVKEIKNGRL AMFSMFGFFV QAIVTGKGPL ENLADHLADP
260
VNNNAWSYAT NFVPGK
Length:266
Mass (Da):28,178
Last modified:August 1, 1992 - v1
Checksum:i1D7BBFFBFC1D01E4
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X52741 mRNA Translation: CAA36955.1
PIRiS11721 CDNT16
RefSeqiXP_016438397.1, XM_016582911.1
UniGeneiNta.3519

Genome annotation databases

GeneIDi107764358
KEGGinta:107764358

Similar proteinsi

Entry informationi

Entry nameiCB21_TOBAC
AccessioniPrimary (citable) accession number: P27492
Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 1, 1992
Last sequence update: August 1, 1992
Last modified: February 28, 2018
This is version 88 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

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

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