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Protein

Light-harvesting protein B-800/850 alpha chain

Gene
N/A
Organism
Rhodoblastus acidophilus (Rhodopseudomonas acidophila)
Status
Reviewed-Annotation score: Annotation score: 3 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)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi31 – 311Magnesium (bacteriochlorophyll axial ligand)

GO - Molecular functioni

  1. bacteriochlorophyll binding Source: UniProtKB-KW
  2. electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity Source: InterPro
  3. metal ion binding Source: UniProtKB-KW

GO - Biological processi

  1. photosynthesis, light reaction Source: InterPro
  2. protein-chromophore linkage Source: UniProtKB-KW
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-800/850 alpha chain
Alternative name(s):
Antenna pigment protein alpha chain
OrganismiRhodoblastus acidophilus (Rhodopseudomonas acidophila)
Taxonomic identifieri1074 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaAlphaproteobacteriaRhizobialesBradyrhizobiaceaeRhodoblastus

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Topological domaini1 – 1313CytoplasmicAdd
BLAST
Transmembranei14 – 3421HelicalAdd
BLAST
Topological domaini35 – 5319PeriplasmicAdd
BLAST

GO - Cellular componenti

  1. integral component of membrane Source: UniProtKB-KW
  2. organelle inner membrane Source: InterPro
  3. plasma membrane Source: UniProtKB-SubCell
  4. plasma membrane light-harvesting complex Source: InterPro
Complete GO annotation...

Keywords - Cellular componenti

Antenna complex, Cell inner membrane, Cell membrane, Membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 5353Light-harvesting protein B-800/850 alpha chainPRO_0000099787Add
BLAST

Interactioni

Subunit structurei

The core complex is formed by 9 alpha and 9 beta chains that bind bacteriochlorophyll and carotenoid molecules, and is disposed around the reaction center. The non-pigmented gamma chains may constitute additional components (By similarity).By similarity

Structurei

Secondary structure

1
53
Legend: HelixTurnBeta strand
Show more details
Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Helixi6 – 83Combined sources
Helixi12 – 3726Combined sources
Helixi40 – 467Combined sources

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1KZUX-ray2.50A/D/G1-53[»]
1NKZX-ray2.00A/C/E1-53[»]
2FKWX-ray2.45A/C/E/G/I/K/M/O/R1-53[»]
ProteinModelPortaliP26789.
SMRiP26789. Positions 2-53.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP26789.

Family & Domainsi

Keywords - Domaini

Transmembrane, Transmembrane helix

Family and domain databases

Gene3Di4.10.220.20. 1 hit.
InterProiIPR000066. Antenna_a/b.
IPR018332. Antenna_alpha.
IPR002361. Antenna_alpha_CS.
[Graphical view]
PfamiPF00556. LHC. 1 hit.
[Graphical view]
PRINTSiPR00673. LIGHTHARVSTA.
SUPFAMiSSF56918. SSF56918. 1 hit.
PROSITEiPS00968. ANTENNA_COMP_ALPHA. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

P26789-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MNQGKIWTVV NPAIGIPALL GSVTVIAILV HLAILSHTTW FPAYWQGGVK

KAA
Length:53
Mass (Da):5,654
Last modified:August 1, 1992 - v1
Checksum:i210F7597804C2E7F
GO

Sequence databases

PIRiS06365.

Cross-referencesi

Sequence databases

PIRiS06365.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1KZUX-ray2.50A/D/G1-53[»]
1NKZX-ray2.00A/C/E1-53[»]
2FKWX-ray2.45A/C/E/G/I/K/M/O/R1-53[»]
ProteinModelPortaliP26789.
SMRiP26789. Positions 2-53.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Miscellaneous databases

EvolutionaryTraceiP26789.

Family and domain databases

Gene3Di4.10.220.20. 1 hit.
InterProiIPR000066. Antenna_a/b.
IPR018332. Antenna_alpha.
IPR002361. Antenna_alpha_CS.
[Graphical view]
PfamiPF00556. LHC. 1 hit.
[Graphical view]
PRINTSiPR00673. LIGHTHARVSTA.
SUPFAMiSSF56918. SSF56918. 1 hit.
PROSITEiPS00968. ANTENNA_COMP_ALPHA. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. "The complete amino acid sequences of the B800-850 antenna polypeptides from Rhodopseudomonas acidophila strain 7750."
    Bissig I., Brunisholz R.A., Suter F., Cogdell R.J., Zuber H.
    Z. Naturforsch. C 43:77-83(1988) [PubMed] [Europe PMC] [Abstract]
    Cited for: PROTEIN SEQUENCE.
    Strain: DSM 141 / 7750 / LMG 4302.
  2. Brunisholz R.A., Bissig I., Niederer E., Suter F., Zuber H.
    (In) Biggins J. (eds.); Progress in photosynthesis research, pp.II.1:13-16, Martinus Nijhoff, The Hague (1987)
    Cited for: PROTEIN SEQUENCE.
    Strain: DSM 141 / 7750 / LMG 4302.
  3. "Pigment-pigment interactions and energy transfer in the antenna complex of the photosynthetic bacterium Rhodopseudomonas acidophila."
    Freer A., Prince S., Sauer K., Papiz M., Hawthornthwaite-Lawless A., McDermott G., Cogdell R., Isaacs N.W.
    Structure 4:449-462(1996) [PubMed] [Europe PMC] [Abstract]
    Cited for: X-RAY CRYSTALLOGRAPHY (2.5 ANGSTROMS) IN COMPLEX WITH BACTERIOCHLOROPHYLL AND CAROTENOID, SUBUNIT.
  4. "Apoprotein structure in the LH2 complex from Rhodopseudomonas acidophila strain 10050: modular assembly and protein pigment interactions."
    Prince S.M., Papiz M.Z., Freer A.A., McDermott G., Hawthornthwaite-Lawless A.M., Cogdell R.J., Isaacs N.W.
    J. Mol. Biol. 268:412-423(1997) [PubMed] [Europe PMC] [Abstract]
    Cited for: X-RAY CRYSTALLOGRAPHY (2.5 ANGSTROMS) IN COMPLEX WITH BACTERIOCHLOROPHYLL AND CAROTENOID, SUBUNIT.
    Strain: 10050.

Entry informationi

Entry nameiLHA4_RHOAC
AccessioniPrimary (citable) accession number: P26789
Entry historyi
Integrated into UniProtKB/Swiss-Prot: August 1, 1992
Last sequence update: August 1, 1992
Last modified: January 7, 2015
This is version 84 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Direct protein sequencing

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references

External Data

Dasty 3

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 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.