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Protein

Light-harvesting protein B-875 beta chain

Gene

pufB

Organism
Rhodobacter sphaeroides (strain ATCC 17023 / 2.4.1 / NCIB 8253 / DSM 158)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

Functioni

Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi21Magnesium (bacteriochlorophyll axial ligand)By similarity1
Metal bindingi39Magnesium (bacteriochlorophyll axial ligand)By similarity1

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Light-harvesting polypeptide

Keywords - Ligandi

Bacteriochlorophyll, Chlorophyll, Chromophore, Magnesium, Metal-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Light-harvesting protein B-875 beta chain
Alternative name(s):
Antenna pigment protein beta chain
LH-3A
Gene namesi
Name:pufB
Ordered Locus Names:RHOS4_18630
ORF Names:RSP_6108
OrganismiRhodobacter sphaeroides (strain ATCC 17023 / 2.4.1 / NCIB 8253 / DSM 158)
Taxonomic identifieri272943 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaAlphaproteobacteriaRhodobacteralesRhodobacteraceaeRhodobacter
Proteomesi
  • UP000002703 Componenti: Chromosome 1

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini2 – 27CytoplasmicBy similarityAdd BLAST26
Transmembranei28 – 45Helical; Signal-anchor for type II membrane proteinBy similarityAdd BLAST18
Topological domaini46 – 49PeriplasmicBy similarity4

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Antenna complex, Cell inner membrane, Cell membrane, Membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemovedBy similarity
ChainiPRO_00000998342 – 49Light-harvesting protein B-875 beta chainAdd BLAST48

Interactioni

Subunit structurei

The core complex is formed by different alpha and beta chains, binding bacteriochlorophyll molecules, and arranged most probably in tetrameric structures disposed around the reaction center. The non-pigmented gamma chains may constitute additional components.

Protein-protein interaction databases

STRINGi272943.RSP_6108.

Structurei

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
4V9GX-ray7.78A4/A6/A8/A9/AE/AG/AI/AK/AO/AQ/AS/AU/AW/AY/B4/B6/B8/B9/BE/BG/BI/BK/BO/BQ/BS/BU/BW/BY1-49[»]
ProteinModelPortaliQ3J1A3.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Signal-anchor, Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG4105X2X. Bacteria.
ENOG411249S. LUCA.
HOGENOMiHOG000230332.
KOiK08927.
OrthoDBiPOG091H1K7Q.
PhylomeDBiQ3J1A3.

Family and domain databases

InterProiIPR000066. Antenna_a/b.
IPR002362. Antenna_beta.
IPR023623. Antenna_beta_CS.
[Graphical view]
PfamiPF00556. LHC. 1 hit.
[Graphical view]
PIRSFiPIRSF002900. Antenna_beta. 1 hit.
PRINTSiPR00674. LIGHTHARVSTB.
SUPFAMiSSF56918. SSF56918. 1 hit.
PROSITEiPS00969. ANTENNA_COMP_BETA. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

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

Q3J1A3-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40 
MADKSDLGYT GLTDEQAQEL HSVYMSGLWL FSAVAIVAHL AVYIWRPWF
Length:49
Mass (Da):5,588
Last modified:January 23, 2007 - v3
Checksum:i8C5B2F707B557582
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M15105 Genomic DNA. Translation: AAA26166.1.
AF195122 Genomic DNA. Translation: AAF24302.1.
CP000143 Genomic DNA. Translation: ABA79431.1.
PIRiB27760. LBRFAS.
RefSeqiWP_002720423.1. NZ_AKVW01000001.1.
YP_353332.1. NC_007493.2.

Genome annotation databases

EnsemblBacteriaiABA79431; ABA79431; RSP_6108.
GeneIDi3719401.
KEGGirsp:RSP_6108.
PATRICi23153654. VBIRhoSph57909_2202.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M15105 Genomic DNA. Translation: AAA26166.1.
AF195122 Genomic DNA. Translation: AAF24302.1.
CP000143 Genomic DNA. Translation: ABA79431.1.
PIRiB27760. LBRFAS.
RefSeqiWP_002720423.1. NZ_AKVW01000001.1.
YP_353332.1. NC_007493.2.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
4V9GX-ray7.78A4/A6/A8/A9/AE/AG/AI/AK/AO/AQ/AS/AU/AW/AY/B4/B6/B8/B9/BE/BG/BI/BK/BO/BQ/BS/BU/BW/BY1-49[»]
ProteinModelPortaliQ3J1A3.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi272943.RSP_6108.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiABA79431; ABA79431; RSP_6108.
GeneIDi3719401.
KEGGirsp:RSP_6108.
PATRICi23153654. VBIRhoSph57909_2202.

Phylogenomic databases

eggNOGiENOG4105X2X. Bacteria.
ENOG411249S. LUCA.
HOGENOMiHOG000230332.
KOiK08927.
OrthoDBiPOG091H1K7Q.
PhylomeDBiQ3J1A3.

Family and domain databases

InterProiIPR000066. Antenna_a/b.
IPR002362. Antenna_beta.
IPR023623. Antenna_beta_CS.
[Graphical view]
PfamiPF00556. LHC. 1 hit.
[Graphical view]
PIRSFiPIRSF002900. Antenna_beta. 1 hit.
PRINTSiPR00674. LIGHTHARVSTB.
SUPFAMiSSF56918. SSF56918. 1 hit.
PROSITEiPS00969. ANTENNA_COMP_BETA. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiLHB1_RHOS4
AccessioniPrimary (citable) accession number: Q3J1A3
Secondary accession number(s): P02951
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 21, 1986
Last sequence update: January 23, 2007
Last modified: November 2, 2016
This is version 74 of the entry and version 3 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.