| Symbol: | KilA-N |
| KilA-N | |
| Pfam: | PF04383 |
| Interpro: | IPR018004 |
| Scop: | 1bm8 |
In molecular biology, the KilA-N domain is a conserved DNA-binding domain found at the N-terminus of the poxvirus D6R/NIR proteins. It is also found in a wide range of proteins of large bacterial and eukaryotic DNA viruses.[1] Putative proteins with homology to the KilA-N domain have also been identified in Maverick transposable elements of the parabasalid protozoa Trichomonas vaginalis.[2] The KilA-N domain has been suggested to be homologous to the fungal DNA-binding APSES domain. In all proteins shown to contain the KilA-N domain, it occurs at the extreme amino terminus accompanied by a wide range of distinct carboxy-terminal domains. These carboxy-terminal modules may be enzymes, such as the nuclease domains, or might mediate additional, specific interactions with nucleic acids or proteins, like the RING or CCCH fingers in the poxviruses.[1] The KilA-N domain is predicted to adopt an alpha-beta fold with four conserved strands and at least two conserved helices.[1] Some proteins known to contain a KilA-N domain are listed below: