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Protein

Chlorophyll a-b binding protein 6A, chloroplastic

Gene

CAB6A

Organism
Solanum lycopersicum (Tomato) (Lycopersicon esculentum)
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 bindingi49Magnesium (chlorophyll-b 1 axial ligand); via carbonyl oxygenBy similarity1
Binding sitei69Chlorophyll-a 1; via amide nitrogenBy similarity1
Metal bindingi88Magnesium (chlorophyll-a 1 axial ligand)By similarity1
Metal bindingi91Magnesium (chlorophyll-a 2 axial ligand)By similarity1
Binding sitei93Chlorophyll-b 2By similarity1
Binding sitei130Chlorophyll-a 3; via amide nitrogenBy similarity1
Metal bindingi134Magnesium (chlorophyll-b 2 axial ligand); via carbonyl oxygenBy similarity1
Metal bindingi154Magnesium (chlorophyll-b 3 axial ligand)By similarity1
Binding sitei157Chlorophyll-b 4By similarity1
Binding sitei191Chlorophyll-a 5By similarity1
Metal bindingi192Magnesium (chlorophyll-a 3 axial ligand)By similarity1
Metal bindingi195Magnesium (chlorophyll-a 4 axial ligand)By similarity1
Binding sitei197Chlorophyll-a 1By similarity1
Metal bindingi209Magnesium (chlorophyll-a 5 axial ligand)By similarity1
Metal bindingi225Magnesium (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 6A, chloroplastic
Alternative name(s):
LHCI type I CAB-6A
Light-harvesting complex I 26 kDa protein
Gene namesi
Name:CAB6A
OrganismiSolanum lycopersicum (Tomato) (Lycopersicon esculentum)
Taxonomic identifieri4081 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaeasteridslamiidsSolanalesSolanaceaeSolanoideaeSolaneaeSolanumLycopersicon
Proteomesi
  • UP000004994 Componenti: Unplaced

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
Transmembranei94 – 114HelicalSequence analysisAdd BLAST21
Transmembranei133 – 153HelicalSequence analysisAdd BLAST21

Keywords - Cellular componenti

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

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transit peptidei1 – 45ChloroplastBy similarityAdd BLAST45
ChainiPRO_000000371046 – 246Chlorophyll a-b binding protein 6A, chloroplasticAdd BLAST201

Post-translational modificationi

Photoregulated by reversible phosphorylation of its threonine residues.By similarity

Keywords - PTMi

Phosphoprotein

Proteomic databases

PaxDbiP12360

Expressioni

Gene expression databases

ExpressionAtlasiP12360 baseline and differential

Interactioni

Subunit structurei

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

Protein-protein interaction databases

STRINGi4081.Solyc05g056070.2.1

Structurei

3D structure databases

ProteinModelPortaliP12360
SMRiP12360
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

eggNOGiENOG410IHXH Eukaryota
ENOG410XVD6 LUCA
InParanoidiP12360
KOiK08907

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.

P12360-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MASNTLMSCG IPAVCPSFLS STKSKFAAAM PVYVGATNFM SRFSMSADWM
60 70 80 90 100
PGQPRPSYLD GSAPGDFGFD SLGLGEVPAN LERYKESELI HCRWAMLAVP
110 120 130 140 150
GIIVPEALGL GNWVKAQEWA AIPGGQATYL GQPVPWGTLP TILAIEFLAI
160 170 180 190 200
AFVEHQRSME KDSEKKKYPG GAFDPLGYSK DPAKFEELKV KEIKNGRLAL
210 220 230 240
LAIVGFCVQQ SAYLGTGPLE NLATHLADPW HNNIGDVIIP KGIFPN
Length:246
Mass (Da):26,575
Last modified:October 1, 1989 - v1
Checksum:i4FC2651B6E84F32F
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti33Y → S in AAA34140 (Ref. 2) Curated1
Sequence conflicti39F → S in AAA34140 (Ref. 2) Curated1
Sequence conflicti71S → P in AAA34140 (Ref. 2) Curated1
Sequence conflicti203I → F in AAA34140 (Ref. 2) Curated1
Sequence conflicti214L → P in AAA34140 (Ref. 2) Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
J03558 mRNA Translation: AAA34186.1
M17633 Genomic DNA Translation: AAA34140.1
PIRiS00443
S06329
RefSeqiNP_001234032.2, NM_001247103.2
UniGeneiLes.19372

Genome annotation databases

GeneIDi544310
KEGGisly:544310

Similar proteinsi

Entry informationi

Entry nameiCB11_SOLLC
AccessioniPrimary (citable) accession number: P12360
Entry historyiIntegrated into UniProtKB/Swiss-Prot: October 1, 1989
Last sequence update: October 1, 1989
Last modified: May 23, 2018
This is version 108 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
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

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