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pufX reaction center-light-harvesting complex protein PufX [ Cereibacter sphaeroides 2.4.1 ]

Gene ID: 3719397, discontinued on 14-May-2026
  • This record was discontinued.
Gene symbol
pufX
Gene description
reaction center-light-harvesting complex protein PufX
Locus tag
RSP_RS09560
Gene type
protein coding
Organism
Cereibacter sphaeroides 2.4.1 (strain: 2.4.1, culture-collection: ATCC:BAA-808, type-material: type strain of Rhodopseudomonas sphaeroides)
Lineage
Bacteria; Pseudomonadati; Pseudomonadota; Alphaproteobacteria; Rhodobacterales; Paracoccaceae; Cereibacter
Old locus tag
RSP_0255
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Location:
chromosome: 1
Sequence:
Chromosome: 1; NC_007493.2 (1980392..1980640, complement)
Genomic Sequence:
NC_007493.2

Go to nucleotide: Graphics FASTA GenBank

GeneRIFs: Gene References Into Functions

What's a GeneRIF?
  1. PufX R49L, PufX R53L, PufX R49/53L and PufX G52L do not affect assembly of PufX within the core or photosynthetic growth but they do prevent dimerization, consistent with predictions from the RC-LH1-PufX structure. The monomeric complex with PufX corresponds to one half of the dimer structure whereas LH1 completely encloses the RC if the gene encoding PufX is deleted.
    Title: The C-terminus of PufX plays a key role in dimerisation and assembly of the reaction center light-harvesting 1 complex from Rhodobacter sphaeroides.
  2. Data show that an alphaTrp-24 -->Phe alteration of the LH1 antenna impairs carotenoid binding and allows photosynthetic growth in the absence of PufX.
    Title: The PufX quinone channel enables the light-harvesting 1 antenna to bind more carotenoids for light collection and photoprotection.
  3. Data show that energy trapping is more efficient when photosynthetic membranes consist of reaction center {RC)-light harvesting complex 1 (LH1)-PufX dimers and light harvesting complex 2 (LH2) complexes.
    Title: Dimerization of core complexes as an efficient strategy for energy trapping in Rhodobacter sphaeroides.
  4. Different functions of PufX in different species of Rhodobacter, and a specific protein structural arrangement that allows PufX to fulfil these three functions is proposed.
    Title: Cross-species investigation of the functions of the Rhodobacter PufX polypeptide and the composition of the RC-LH1 core complex.
  5. N-terminus of PufX is processed at an early stage in the development of the photosynthetic membrane in Rhodobacter sphaeroides.
    Title: Experimental evidence that the membrane-spanning helix of PufX adopts a bent conformation that facilitates dimerisation of the Rhodobacter sphaeroides RC-LH1 complex through N-terminal interactions.
  6. conformational analysis of RC-LH1-PufX core dimer of Rhodobacter sphaeroides
    Title: Three-dimensional reconstruction of a membrane-bending complex: the RC-LH1-PufX core dimer of Rhodobacter sphaeroides.
  7. structure of PufX in organic solvent reveals two hydrophobic helices flanked by unstructured termini and connected by a helical bend
    Title: The solution structure of the PufX polypeptide from Rhodobacter sphaeroides.
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Preferred Names
reaction center-light-harvesting complex protein PufX

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Genome Annotation

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference assembly

Genomic

  1. NC_007493.2 Reference assembly

    Range
    1980392..1980640 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. WP_002720419.1 reaction center-light-harvesting complex protein PufX

    See identical proteins and their annotated locations for WP_002720419.1

Nucleotide Protein
Heading Accession and Version
Protein Accession Links
GenPept Link UniProtKB Link
P13402.1