Definition
ZNF182 is a protein‑coding gene in Homo sapiens that encodes zinc finger protein 182, a member of the Krüppel‑associated box (KRAB) zinc‑finger transcription factor family.
Overview
The ZNF182 gene is located on the short arm of the X chromosome (Xp11.23), spanning base pairs 47,974,851 to 48,003,989 in the GRCh38 reference genome. Orthologous copies are found in other mammals, including a mouse counterpart on chromosome X (X A1.3). The gene is transcribed into several mRNA isoforms (e.g., NM_006962, NM_001007088) that translate into proteins of approximately 500–600 amino acids, each containing multiple C2H2 zinc‑finger motifs that mediate DNA binding.
Expression profiling indicates that ZNF182 is broadly expressed across many tissues. In humans, high expression levels have been reported in secondary oocytes, the cerebellar vermis, thymus, nasal epithelium, skeletal muscle, trabecular bone, pylorus, middle temporal gyrus, pericardium, and embryonic structures such as the ventricular zone and ganglionic eminence. Similar patterns are observed in mouse orthologs.
Etymology / Origin
The name “ZNF182” derives from “zinc finger protein 182,” reflecting its membership in the large zinc‑finger protein family. The numerical suffix distinguishes it from other zinc‑finger genes identified in the human genome. The gene has also been referenced by aliases such as HHZ150, KOX14, ZNF21, and Zfp182 in earlier literature.
Characteristics
- Molecular function: Acts as a DNA‑binding transcription factor, primarily through its KRAB‑containing C2H2 zinc‑finger domains. It participates in transcriptional regulation, particularly the repression of target genes via recruitment of corepressor complexes.
- Cellular component: Localizes to the nucleus, consistent with its role in gene regulation.
- Biological processes: Involved in the regulation of transcription by RNA polymerase II and broader DNA‑templated transcriptional control.
- Protein structure: Contains multiple tandem zinc‑finger motifs that recognize specific DNA sequences, and a KRAB domain that mediates transcriptional repression.
- Genomic context: The ZNF182 locus resides within a cluster of KRAB‑zinc‑finger genes on Xp11.23, a region noted for frequent chromosomal rearrangements and evolutionary gene duplication events.
Related Topics
- Zinc finger proteins: A large family of transcription factors characterized by C2H2 zinc‑finger motifs.
- KRAB domain: A transcriptional repression module commonly found in zinc‑finger proteins.
- Chromosome X (Xp11.23): The cytogenetic band where ZNF182 is situated; notable for gene clusters and disease‑associated rearrangements.
- Transcriptional regulation: The broader biological process in which ZNF182 participates.
- Orthologous genes: Mouse Zfp182 and other vertebrate homologs that provide comparative insight into function and evolution.
References
- Entrez Gene: ZNF182 (OMIM 314993)
- Knight J.C. et al., “Clustered organization of Krüppel zinc‑finger genes at Xp11.23,” Genomics, 1994.
- Huebner K. et al., “Twenty‑seven nonoverlapping zinc finger cDNAs from human T cells map to nine different chromosomes,” Am. J. Hum. Genet., 1991.