MT-ND3

Source: Wikipedia, the free encyclopedia.
ND3
Identifiers
Gene ontology
Molecular function
Cellular component
Biological process
Sources:Amigo / QuickGO
Ensembl
UniProt
RefSeq (mRNA)

n/a

n/a

RefSeq (protein)

n/a

NP_904335

Location (UCSC)Chr M: 0.01 – 0.01 MbChr M: 0.01 – 0.01 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse
Location of the MT-ND3 gene in the human mitochondrial genome. MT-ND3 is one of the seven NADH dehydrogenase mitochondrial genes (yellow boxes).

MT-ND3 is a

Leigh's syndrome (LS) and Leber's hereditary optic neuropathy (LHON).[7][8]

Structure

General features

MT-ND3 is located in human

hydrophilic domain for the peripheral arm that includes all the known redox centres and the NADH binding site. The MT-ND3 product and the rest of the mitochondrially encoded subunits are the most hydrophobic of the subunits of Complex I and form the core of the transmembrane region.[6]

Untranslated extra nucleotide

In the MT-ND3 gene from many species of birds and turtles [11] there is an extra nucleotide that is not translated to protein.[12]

Translational frameshifting or RNA editing
are alternative explanations for maintenance of the functionality of the ND3 reading frame in birds possessing the one-nucleotide insertion. This extra nucleotide feature suggests that turtles might be related to The absence of the extra nucleotide in crocodilians and some birds and turtles might also indicate that the corresponding taxa have lost this feature.

Function

The MT-ND3 product is a subunit of the respiratory chain

isoalloxazine ring of the flavin mononucleotide (FMN) prosthetic arm to form FMNH2. The electrons are transferred through a series of iron-sulfur (Fe-S) clusters in the prosthetic arm and finally to coenzyme Q10 (CoQ), which is reduced to ubiquinol (CoQH2). The flow of electrons changes the redox state of the protein, resulting in a conformational change and pK shift of the ionizable side chain, which pumps four hydrogen ions out of the mitochondrial matrix.[6]

Clinical significance

Pathogenic variants of the mitochondrial gene MT-ND3 are known to cause mtDNA-associated

MELAS) and the previously mentioned Leigh syndrome.[8]

Interactions

MT-ND3 has been shown to have 5 binary protein-protein interactions including 2 co-complex interactions. MT-ND3 appears to interact with APP and NDUFA9.[16]

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000198840Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000064360Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ a b "Entrez Gene: MT-ND3 NADH dehydrogenase subunit 3".
  6. ^ .
  7. ^ .
  8. ^ .
  9. .
  10. ^ "NADH-ubiquinone oxidoreductase chain 3". Cardiac Organellar Protein Atlas Knowledgebase (COPaKB).
  11. ^ "Complete mitochondrial genome sequences". megasun.bch.umontreal.ca. Retrieved 2017-02-20.
  12. PMID 12572620
    .
  13. .
  14. .
  15. ^ "MT-ND3 - NADH-ubiquinone oxidoreductase chain 3 - Homo sapiens (Human)". UniProt.org: a hub for protein information. The UniProt Consortium.
  16. ^ "5 binary interactions found for search term MT-ND3". IntAct Molecular Interaction Database. EMBL-EBI. Retrieved 2018-08-25.

Further reading

External links

This page is based on the copyrighted Wikipedia article: MT-ND3. Articles is available under the CC BY-SA 3.0 license; additional terms may apply.Privacy Policy