Article · Wikipedia archive · Last revised Jun 14, 2026

MPLKIP

M-phase-specific PLK1-interacting protein is a protein that in humans is encoded by the MPLKIP gene. Patients with an inherited defect in both alleles of the gene suffer from trichothiodystrophy (TTD), a disease hallmarked by brittle hair and nails and usually by developmental difficulties as well. One patient carries a homozygous deletion of the whole gene area, which indicates that the gene is not essential for embryonic development. TTD can be diagnosed by the presence of tigertail-striped patterns in hair visible under polarised light microscopy, or biochemically by a reduced Cys content of the hairs. Only a minority of the TTD cases carry a MPLKIP defect: more frequently, the gene ERCC2 is mutated, which encodes a subunit of the protein complex TFIIH that is required for general transcription and for nucleotide excision repair of DNA damage.

Last revised
Jun 14, 2026
Read time
≈ 3 min
Length
619 w
Citations
10
Source
MPLKIP
Identifiers
AliasesMPLKIP, ABHS, C7orf11, ORF20, TTD4, M-phase specific PLK1 interacting protein
External IDsOMIM: 609188; MGI: 1913558; HomoloGene: 32633; GeneCards: MPLKIP; OMA:MPLKIP - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_138701

NM_025479

RefSeq (protein)

NP_619646

NP_079755

Location (UCSC)Chr 7: 40.13 – 40.13 MbChr 13: 17.87 – 17.87 Mb
PubMed search34
Wikidata
View/Edit HumanView/Edit Mouse

M-phase-specific PLK1-interacting protein (TTD non-photosensitive 1 protein) is a protein that in humans is encoded by the MPLKIP gene (previously known as C7orf11).56 Patients with an inherited defect in both alleles of the gene suffer from trichothiodystrophy (TTD), a disease hallmarked by brittle hair and nails and usually by developmental difficulties as well. One patient carries a homozygous deletion of the whole gene area, which indicates that the gene is not essential for embryonic development. TTD can be diagnosed by the presence of tigertail-striped patterns in hair visible under polarised light microscopy, or biochemically by a reduced Cys content of the hairs. Only a minority of the TTD cases carry a MPLKIP defect: more frequently, the gene ERCC2 is mutated, which encodes a subunit of the protein complex TFIIH that is required for general transcription and for nucleotide excision repair of DNA damage.


References

References

  1. GRCh38: Ensembl release 89: ENSG00000168303Ensembl, May 2017
  2. GRCm38: Ensembl release 89: ENSMUSG00000012429Ensembl, 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. Nakabayashi K, Fernandez BA, Teshima I, Shuman C, Proud VK, Curry CJ, Chitayat D, Grebe T, Ming J, Oshimura M, Meguro M, Mitsuya K, Deb-Rinker P, Herbrick JA, Weksberg R, Scherer SW (Feb 2002). "Molecular genetic studies of human chromosome 7 in Russell-Silver syndrome". Genomics. 79 (2): 186–96. doi:10.1006/geno.2002.6695. PMID 11829489.
  6. "Entrez Gene: C7orf11 chromosome 7 open reading frame 11".
Further reading

Further reading