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Protein

Chlorophyll a-b binding protein type 2 member 1B, chloroplastic

Gene
N/A
Organism
Pinus sylvestris (Scots pine)
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 bindingi66Magnesium (chlorophyll-b 1 axial ligand); via carbonyl oxygenBy similarity1
Binding sitei88Chlorophyll-a 1; via amide nitrogenBy similarity1
Binding sitei94Chlorophyll-a 1By similarity1
Metal bindingi107Magnesium (chlorophyll-a 1 axial ligand)By similarity1
Metal bindingi110Magnesium (chlorophyll-a 2 axial ligand)By similarity1
Binding sitei112Chlorophyll-b 2By similarity1
Binding sitei145Chlorophyll-a 3By similarity1
Binding sitei155Chlorophyll-a 3; via amide nitrogenBy similarity1
Metal bindingi161Magnesium (chlorophyll-b 2 axial ligand); via carbonyl oxygenBy similarity1
Binding sitei165Chlorophyll-b 3By similarity1
Binding sitei173Chlorophyll-b 4 or chlorophyll-b 5By similarity1
Metal bindingi181Magnesium (chlorophyll-b 3 axial ligand)By similarity1
Binding sitei184Chlorophyll-b 4By similarity1
Binding sitei190Chlorophyll-b 2; via amide nitrogenBy similarity1
Binding sitei221Chlorophyll-a 5By similarity1
Metal bindingi222Magnesium (chlorophyll-a 3 axial ligand)By similarity1
Metal bindingi225Magnesium (chlorophyll-a 4 axial ligand)By similarity1
Binding sitei227Chlorophyll-a 1By similarity1
Metal bindingi239Magnesium (chlorophyll-a 5 axial ligand)By similarity1
Metal bindingi254Magnesium (chlorophyll-a 6 axial ligand)By similarity1
Binding sitei263Chlorophyll-a 6; via amide nitrogenBy similarity1
Binding sitei270Chlorophyll-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 type 2 member 1B, chloroplastic
Alternative name(s):
Chlorophyll a-b binding protein type II 1B
Short name:
CAB
LHCP
OrganismiPinus sylvestris (Scots pine)
Taxonomic identifieri3349 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaPinidaePinalesPinaceaePinusPinus

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
Transmembranei108 – 128HelicalSequence analysisAdd BLAST21
Transmembranei160 – 180HelicalSequence analysisAdd BLAST21
Transmembranei228 – 248HelicalSequence analysisAdd BLAST21

Keywords - Cellular componenti

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

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transit peptidei1 – 41ChloroplastCuratedAdd BLAST41
ChainiPRO_000000369142 – 274Chlorophyll a-b binding protein type 2 member 1B, chloroplasticAdd BLAST233

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei42N2-acetylarginineBy similarity1

Post-translational modificationi

Photoregulated by reversible phosphorylation of its threonine residues.By similarity

Keywords - PTMi

Acetylation, Phosphoprotein

Interactioni

Subunit structurei

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

Structurei

3D structure databases

ProteinModelPortaliP15194
SMRiP15194
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

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.

P15194-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MASCGIGSCA FAGGQISSLK PHTNQLLGVG AGVHGEARVT MRKATTKKLT
60 70 80 90 100
ASASTSPWYG PDRVLYLGPF SGEPPSYLTG EFPGDYGWDT AGLSADPENF
110 120 130 140 150
AKNRELEVIH CRWAMLGALG CVFPELLARN GVKFGEAVWF KAGAQIFSEG
160 170 180 190 200
GLDYLGNPSL VHAQSILAIW ACQVILMGAV EGYRIAGGPL GEVTDPIYPG
210 220 230 240 250
GSFDPLGLAE DPEAFAELKV KEIKNGRLAM FSMFGFFVQA IVTGKGPIEN
260 270
LADHLADPVN NNAWAYATNF VPGK
Length:274
Mass (Da):29,032
Last modified:April 1, 1990 - v1
Checksum:i2126B164246D9332
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X14506 mRNA Translation: CAA32658.1
PIRiS07999

Similar proteinsi

Entry informationi

Entry nameiCB2B_PINSY
AccessioniPrimary (citable) accession number: P15194
Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 1, 1990
Last sequence update: April 1, 1990
Last modified: May 23, 2018
This is version 90 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Documents

  1. SIMILARITY comments
    Index of protein domains and families

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