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Gene Review

UNC50  -  unc-50 homolog (C. elegans)

Homo sapiens

Synonyms: GMH1, HSD-23, HSD23, PDLs22, Periodontal ligament-specific protein 22, ...
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Disease relevance of UNC50

  • Hemagglutinin tagged UNCL was stably transfected into SaOS-2 osteosarcoma cells and exhibited a nuclear rim staining pattern which was retained following extraction with 1% Triton X-100, suggesting that UNCL localizes to the inner nuclear membrane [1].

High impact information on UNC50


Biological context of UNC50

  • DNA blot analysis of 20 URP genes detected no restriction fragment length polymorphisms (RFLP) between two relatively distant rice varieties, suggesting that the URP genes are highly conserved and likely play important roles in pollination and fertilization [3].

Anatomical context of UNC50

  • We conclude that UNCL is a novel inner nuclear membrane protein that associates with RNA and is involved in the cell-surface expression of neuronal nicotinic receptors [1].
  • UNCL-HA was extractable in 350 mM NaCl, suggesting that UNCL is not associated with the nuclear matrix [1].
  • The 777 kb rat UNCL cDNA encodes a 259 amino acid protein that is expressed in a wide variety of tissues with highest mRNA levels in brain, kidney and testis [1].
  • When UNCL was co-expressed with neural nicotinic receptors in Xenopus oocytes or COS cells it increased expression of functional cell surface receptors up to 1 [1].
  • The expression of UNCL mRNA and protein increases with PDL fibroblast differentiation from the confluent to multilayer stage but slightly decreases on mineralized nodule formation [2].

Associations of UNC50 with chemical compounds

  • Homopolymer RNA-binding assays performed on in vitro translated UNCL protein and 'structural modeling by homology' suggest that UNCL binds RNA via an amino-terminal RNA Recognition-like Motif [1].

Analytical, diagnostic and therapeutic context of UNC50

  • HPLC demonstrated the existence of at least three prominent activity peaks in plasma and urine, the more hydrophobic of which did not co-elute with U-II, degradation products or URP [4].


  1. UNCL, the mammalian homologue of UNC-50, is an inner nuclear membrane RNA-binding protein. Fitzgerald, J., Kennedy, D., Viseshakul, N., Cohen, B.N., Mattick, J., Bateman, J.F., Forsayeth, J.R. Brain Res. (2000) [Pubmed]
  2. Expression of UNCL during development of periodontal tissue and response of periodontal ligament fibroblasts to mechanical stress in vivo and in vitro. Kim, H.J., Choi, Y.S., Jeong, M.J., Kim, B.O., Lim, S.H., Kim, d.o. .K., Kim, C.K., Park, J.C. Cell Tissue Res. (2007) [Pubmed]
  3. Expressional profiling of genes related to pollination and fertilization in rice. Chen, W., Tang, D., Suo, J., Zhang, Y., Xue, Y. C. R. Acad. Sci. III, Sci. Vie (2001) [Pubmed]
  4. Differential levels of "urotensin-II-like" activity determined by radio-receptor and radioimmuno-assays. Aiyar, N., Guida, B., Ao, Z., Disa, J., Naselsky, D., Behm, D.J., Su, J.L., Kull, F.C., Douglas, S.A. Peptides (2004) [Pubmed]
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