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Protein

Light-harvesting protein B-800/850 alpha chain

Gene

A1

Organism
Phaeospirillum molischianum (Rhodospirillum molischianum)
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 bindingi35Magnesium (bacteriochlorophyll axial ligand)Sequence analysis1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionLight-harvesting polypeptide
LigandBacteriochlorophyll, 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
Gene namesi
Name:A1
Synonyms:A2, A3
OrganismiPhaeospirillum molischianum (Rhodospirillum molischianum)
Taxonomic identifieri1083 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaAlphaproteobacteriaRhodospirillalesRhodospirillaceaePhaeospirillum

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini2 – 18CytoplasmicSequence analysisAdd BLAST17
Transmembranei19 – 39HelicalSequence analysisAdd BLAST21
Topological domaini40 – 57PeriplasmicSequence analysisAdd BLAST18

GO - Cellular componenti

Keywords - Cellular componenti

Antenna complex, Cell inner membrane, Cell membrane, Membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemoved
ChainiPRO_00000997952 – 57Light-harvesting protein B-800/850 alpha chainAdd BLAST56

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.

Protein-protein interaction databases

DIPiDIP-59511N.

Structurei

Secondary structure

157
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi5 – 9Combined sources5
Helixi10 – 13Combined sources4
Helixi16 – 40Combined sources25
Helixi42 – 44Combined sources3
Helixi46 – 56Combined sources11

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1LGHX-ray2.40A/D/G/J2-57[»]
ProteinModelPortaliP97253.
SMRiP97253.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP97253.

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Family and domain databases

InterProiView protein in InterPro
IPR000066. Antenna_a/b.
IPR018332. Antenna_alpha.
IPR002361. Antenna_alpha_CS.
PfamiView protein in Pfam
PF00556. LHC. 1 hit.
PRINTSiPR00673. LIGHTHARVSTA.
SUPFAMiSSF56918. SSF56918. 1 hit.
PROSITEiView protein in PROSITE
PS00968. ANTENNA_COMP_ALPHA. 1 hit.

Sequencei

Sequence statusi: Complete.

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

P97253-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSNPKDDYKI WLVINPSTWL PVIWIVATVV AIAVHAAVLA APGFNWIALG

AAKSAAK
Length:57
Mass (Da):6,071
Last modified:January 23, 2007 - v3
Checksum:iF39464B98ABB82AA
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
S82431 Genomic DNA. Translation: AAB46770.1.
PIRiA49290.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
S82431 Genomic DNA. Translation: AAB46770.1.
PIRiA49290.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1LGHX-ray2.40A/D/G/J2-57[»]
ProteinModelPortaliP97253.
SMRiP97253.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

DIPiDIP-59511N.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Miscellaneous databases

EvolutionaryTraceiP97253.

Family and domain databases

InterProiView protein in InterPro
IPR000066. Antenna_a/b.
IPR018332. Antenna_alpha.
IPR002361. Antenna_alpha_CS.
PfamiView protein in Pfam
PF00556. LHC. 1 hit.
PRINTSiPR00673. LIGHTHARVSTA.
SUPFAMiSSF56918. SSF56918. 1 hit.
PROSITEiView protein in PROSITE
PS00968. ANTENNA_COMP_ALPHA. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiLHA_PHAMO
AccessioniPrimary (citable) accession number: P97253
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 15, 1998
Last sequence update: January 23, 2007
Last modified: November 2, 2016
This is version 86 of the entry and version 3 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure

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.