Abstract:
:According to recent models, as yet poorly studied architectural proteins appear to be required for local regulation of enhancer-promoter interactions, as well as for global chromosome organization. Transcription factors ZIPIC, Pita and Zw5 belong to the class of chromatin insulator proteins and preferentially bind to promoters near the TSS and extensively colocalize with cohesin and condensin complexes. ZIPIC, Pita and Zw5 are structurally similar in containing the N-terminal zinc finger-associated domain (ZAD) and different numbers of C2H2-type zinc fingers at the C-terminus. Here we have shown that the ZAD domains of ZIPIC, Pita and Zw5 form homodimers. In Drosophila transgenic lines, these proteins are able to support long-distance interaction between GAL4 activator and the reporter gene promoter. However, no functional interaction between binding sites for different proteins has been revealed, suggesting that such interactions are highly specific. ZIPIC facilitates long-distance stimulation of the reporter gene by GAL4 activator in yeast model system. Many of the genomic binding sites of ZIPIC, Pita and Zw5 are located at the boundaries of topologically associated domains (TADs). Thus, ZAD-containing zinc-finger proteins can be attributed to the class of architectural proteins.
journal_name
Nucleic Acids Resjournal_title
Nucleic acids researchauthors
Zolotarev N,Fedotova A,Kyrchanova O,Bonchuk A,Penin AA,Lando AS,Eliseeva IA,Kulakovskiy IV,Maksimenko O,Georgiev Pdoi
10.1093/nar/gkw371subject
Has Abstractpub_date
2016-09-06 00:00:00pages
7228-41issue
15eissn
0305-1048issn
1362-4962pii
gkw371journal_volume
44pub_type
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