A0A3Q9U0B4 · A0A3Q9U0B4_9DIPS

  • Protein
    NAD(P)H-quinone oxidoreductase subunit 2, chloroplastic
  • Gene
    ndhB
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    3/5

Function

function

Core subunit of the mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I) that is believed to belong to the minimal assembly required for catalysis. Complex I functions in the transfer of electrons from NADH to the respiratory chain. The immediate electron acceptor for the enzyme is believed to be ubiquinone.
NDH shuttles electrons from NAD(P)H:plastoquinone, via FMN and iron-sulfur (Fe-S) centers, to quinones in the photosynthetic chain and possibly in a chloroplast respiratory chain. The immediate electron acceptor for the enzyme in this species is believed to be plastoquinone. Couples the redox reaction to proton translocation, and thus conserves the redox energy in a proton gradient.

Catalytic activity

GO annotations

AspectTerm
Cellular Componentchloroplast thylakoid membrane
Molecular FunctionNADH dehydrogenase (ubiquinone) activity
Molecular Functionquinone binding
Biological ProcessATP synthesis coupled electron transport
Biological Processphotosynthesis, light reaction

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    NAD(P)H-quinone oxidoreductase subunit 2, chloroplastic
  • EC number
  • Alternative names
    • NAD(P)H dehydrogenase, subunit 2
    • NADH-plastoquinone oxidoreductase subunit 2

Gene names

    • Name
      ndhB

Encoded on

  • Chloroplast

Organism names

  • Taxonomic identifier
  • Organism
  • Strain
    • C80
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > eudicotyledons > Gunneridae > Pentapetalae > asterids > campanulids > Dipsacales > Caprifoliaceae > Lonicera

Accessions

  • Primary accession
    A0A3Q9U0B4

Subcellular Location

Membrane
; Multi-pass membrane protein
Plastid, chloroplast thylakoid membrane
; Multi-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane22-47Helical
Transmembrane59-79Helical
Transmembrane99-119Helical
Transmembrane126-143Helical
Transmembrane181-203Helical
Transmembrane223-244Helical
Transmembrane296-316Helical
Transmembrane323-342Helical
Transmembrane348-372Helical
Transmembrane393-415Helical
Transmembrane427-448Helical
Transmembrane480-505Helical

Keywords

PTM/Processing

Keywords

Interaction

Subunit

NDH is composed of at least 16 different subunits, 5 of which are encoded in the nucleus.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain18-117NAD(P)H-quinone oxidoreductase subunit 2 N-terminal
Domain146-442NADH:quinone oxidoreductase/Mrp antiporter membrane subunit

Sequence similarities

Belongs to the complex I subunit 2 family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    510
  • Mass (Da)
    56,733
  • Last updated
    2019-04-10 v1
  • Checksum
    5ADA9086B3338926
MIWHVQNENFILDSTRIFMKAFHLLLFDGSLIFPECILIFGLILLLMIDSTSDQKDIPWLYFISSTSLVMSITALLFRWREEPMISFSGNFQTNNFNEIFQFLILLCSTLCIPLSVEYIECTEMAITEFLLFVLTATLGGMFLCGANDLITIFVAPECFSLCSYLLSGYTKKDVRSNEATMKYLLMGGASSSILVHGFSWLYGLSGGEIELQEIVNGLINTQMYNSPGISIALIFITVGIGFKLSPAPSHQWTPDVYEGSPTPVVAFLSVTSKVAASASATRIFDIPFYFSSNEWHLLLEILAILSMILGNLIAITQTSMKRMLAYSSIGQIGYVIIGIIVGDSNDGYASMITYMLFYISMNLGTFACIVLFGLRTGTDNIRDYAGLYTKDPFLALSLALCLLSLGGLPPLAGFFGKLYLFWCGWQAGLYFLVLIGLLTSVVSIYYYLKIIKLLMTGRNQEITPHVRNYRRSPFRSKNSIELSMIVCVIASTIPGISMNPIIAIAQDTLF

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MK176512
EMBL· GenBank· DDBJ
AZZ06228.1
EMBL· GenBank· DDBJ
Genomic DNA
MK176512
EMBL· GenBank· DDBJ
AZZ06229.1
EMBL· GenBank· DDBJ
Genomic DNA
MN524604
EMBL· GenBank· DDBJ
QFQ34072.1
EMBL· GenBank· DDBJ
Genomic DNA
MN524604
EMBL· GenBank· DDBJ
QFQ34086.1
EMBL· GenBank· DDBJ
Genomic DNA
MW242825
EMBL· GenBank· DDBJ
UEK75728.1
EMBL· GenBank· DDBJ
Genomic DNA
MW242825
EMBL· GenBank· DDBJ
UEK75729.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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