8oue

The H/ACA RNP lobe of human telomerase with the dyskerin thumb loop in a semi-closed conformationThe H/ACA RNP lobe of human telomerase with the dyskerin thumb loop in a semi-closed conformation

Structural highlights

8oue is a 10 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Electron Microscopy, Resolution 2.7Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

DKC1_HUMAN Hoyeraal-Hreidarsson syndrome;Dyskeratosis congenita. The disease is caused by variants affecting the gene represented in this entry. Reduced rRNA pseudouridine levels in cells from patients (PubMed:25219674).^[1] The disease is caused by variants affecting the gene represented in this entry.

Function

DKC1_HUMAN Catalytic subunit of H/ACA small nucleolar ribonucleoprotein (H/ACA snoRNP) complex, which catalyzes pseudouridylation of rRNA (PubMed:25219674). This involves the isomerization of uridine such that the ribose is subsequently attached to C5, instead of the normal N1 (PubMed:25219674). Each rRNA can contain up to 100 pseudouridine ('psi') residues, which may serve to stabilize the conformation of rRNAs. Required for ribosome biogenesis and telomere maintenance (PubMed:19179534, PubMed:25219674). Also required for correct processing or intranuclear trafficking of TERC, the RNA component of the telomerase reverse transcriptase (TERT) holoenzyme (PubMed:19179534).^[2] ^[3] Promotes cell to cell and cell to substratum adhesion, increases the cell proliferation rate and leads to cytokeratin hyper-expression.^[4]

References

↑ Schwartz S, Bernstein DA, Mumbach MR, Jovanovic M, Herbst RH, León-Ricardo BX, Engreitz JM, Guttman M, Satija R, Lander ES, Fink G, Regev A. Transcriptome-wide mapping reveals widespread dynamic-regulated pseudouridylation of ncRNA and mRNA. Cell. 2014 Sep 25;159(1):148-162. PMID:25219674 doi:10.1016/j.cell.2014.08.028
↑ Venteicher AS, Abreu EB, Meng Z, McCann KE, Terns RM, Veenstra TD, Terns MP, Artandi SE. A human telomerase holoenzyme protein required for Cajal body localization and telomere synthesis. Science. 2009 Jan 30;323(5914):644-8. PMID:19179534 doi:10.1126/science.1165357
↑ Schwartz S, Bernstein DA, Mumbach MR, Jovanovic M, Herbst RH, León-Ricardo BX, Engreitz JM, Guttman M, Satija R, Lander ES, Fink G, Regev A. Transcriptome-wide mapping reveals widespread dynamic-regulated pseudouridylation of ncRNA and mRNA. Cell. 2014 Sep 25;159(1):148-162. PMID:25219674 doi:10.1016/j.cell.2014.08.028
↑ Angrisani A, Turano M, Paparo L, Di Mauro C, Furia M. A new human dyskerin isoform with cytoplasmic localization. Biochim Biophys Acta. 2011 Dec;1810(12):1361-8. PMID:21820037 doi:10.1016/j.bbagen.2011.07.012

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OCA

[1] Schwartz S, Bernstein DA, Mumbach MR, Jovanovic M, Herbst RH, León-Ricardo BX, Engreitz JM, Guttman M, Satija R, Lander ES, Fink G, Regev A. Transcriptome-wide mapping reveals widespread dynamic-regulated pseudouridylation of ncRNA and mRNA. Cell. 2014 Sep 25;159(1):148-162. PMID:25219674 doi:10.1016/j.cell.2014.08.028

[2] Venteicher AS, Abreu EB, Meng Z, McCann KE, Terns RM, Veenstra TD, Terns MP, Artandi SE. A human telomerase holoenzyme protein required for Cajal body localization and telomere synthesis. Science. 2009 Jan 30;323(5914):644-8. PMID:19179534 doi:10.1126/science.1165357

[3] Schwartz S, Bernstein DA, Mumbach MR, Jovanovic M, Herbst RH, León-Ricardo BX, Engreitz JM, Guttman M, Satija R, Lander ES, Fink G, Regev A. Transcriptome-wide mapping reveals widespread dynamic-regulated pseudouridylation of ncRNA and mRNA. Cell. 2014 Sep 25;159(1):148-162. PMID:25219674 doi:10.1016/j.cell.2014.08.028

[4] Angrisani A, Turano M, Paparo L, Di Mauro C, Furia M. A new human dyskerin isoform with cytoplasmic localization. Biochim Biophys Acta. 2011 Dec;1810(12):1361-8. PMID:21820037 doi:10.1016/j.bbagen.2011.07.012

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