NP_596910.1
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NCBI GenBank Nucleotide #
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UniProt Primary Accession #
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UniProt Secondary Accession #
UniProt Related Accession #
Molecular Weight
56,615 Da
NCBI Official Full Name
H/ACA ribonucleoprotein complex subunit 4
NCBI Official Synonym Full Names
dyskerin pseudouridine synthase 1
NCBI Official Synonym Symbols
NCBI Protein Information
H/ACA ribonucleoprotein complex subunit 4
UniProt Protein Name
H/ACA ribonucleoprotein complex subunit 4
UniProt Synonym Protein Names
Dyskerin; Nopp140-associated protein of 57 kDa; Nucleolar protein NAP57; Nucleolar protein family A member 4; snoRNP protein DKC1
UniProt Synonym Gene Names
NCBI Summary for DKC
nucleolar protein expressed in liver; colocalized with Nopp140 protein; may be involved with rRNA processing [RGD, Feb 2006]
UniProt Comments for DKC
dyskerin: Isoform 1: Required for ribosome biogenesis and telomere maintenance. Probable catalytic subunit of H/ACA small nucleolar ribonucleoprotein (H/ACA snoRNP) complex, which catalyzes pseudouridylation of rRNA. This involves the isomerization of uridine such that the ribose is subsequently attached to C5, instead of the normal N1. Each rRNA can contain up to 100 pseudouridine ('psi') residues, which may serve to stabilize the conformation of rRNAs. Also required for correct processing or intranuclear trafficking of TERC, the RNA component of the telomerase reverse transcriptase (TERT) holoenzyme. Defects in DKC1 are a cause of dyskeratosis congenita X- linked recessive (XDKC). XDKC is a rare, progressive bone marrow failure syndrome characterized by the triad of reticulated skin hyperpigmentation, nail dystrophy, and mucosal leukoplakia. Early mortality is often associated with bone marrow failure, infections, fatal pulmonary complications, or malignancy. Defects in DKC1 are the cause of Hoyeraal-Hreidarsson syndrome (HHS). HHS is a multisystem disorder affecting males and is characterized by aplastic anemia, immunodeficiency, microcephaly, cerebellar hypoplasia, and growth retardation. Belongs to the pseudouridine synthase TruB family. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: EC 5.4.99.-; Isomerase; Lyase; Nucleolus; RNA processing; RNA-binding
Chromosomal Location of Human Ortholog: Xq37
Cellular Component: Cajal body; fibrillar center; nucleolus; nucleoplasm; nucleus; telomerase holoenzyme complex
Molecular Function: protein binding; pseudouridine synthase activity; RNA binding; telomerase activity
Biological Process: box H/ACA snoRNA 3'-end processing; box H/ACA snoRNA metabolic process; positive regulation of cell proliferation; positive regulation of telomerase activity; positive regulation of telomere maintenance via telomerase; rRNA pseudouridine synthesis; snoRNA guided rRNA pseudouridine synthesis; snRNA pseudouridine synthesis; telomere maintenance via telomerase
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Pathways associated with anti-DKC antibody
Diseases associated with anti-DKC antibody
Organs/Tissues associated with anti-DKC antibody
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