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NKX2.5 Homeodomain

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[[Image:Map.png |thumb|right|upright=3.5|''Organization of the biological protein NKX2.5. The structures analyzed only represent the homeodomain region.'']]
[[Image:Map.png |thumb|right|upright=3.5|''Organization of the biological protein NKX2.5. The structures analyzed only represent the homeodomain region.'']]
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The transcription factor, NKX2.5 is one of many proteins classified as a homeodomain, and functions to regulate structural development in eukaryotes. These proteins share a characteristic evolutionarily conserved fold containing <scene name='91/911264/Three_alpha_helices/2'>three alpha-helices</scene>. <ref name="WJ"> PMID: 7979246 </ref>. DNA-binding is mediated through the insertion of the C-terminal side <scene name='91/911264/Major_groove_interaction/4'>alpha-helix</scene> (alpha-3) into the major groove, allowing for base-reside interactions. This allows homeodomains to locate and bind specific DNA sequences, leading to transcriptional activation or repression <ref> PMID: 26464018 </ref>. The homeodomain of NKX2.5 is flanked by both a N and C-terminal regulatory domain. This puts the biological protein at 324 residues with the homeodomain consisting of residues 138-197 <ref> PMID: 22849347 </ref> Research into the structure and function of NKX2.5 has mainly been focused on the DNA-binding homeodomain, as mutations in this region have been linked to specific diseases <ref name="Schott"> PMID: 9651244</ref>. This page will focus on the specific interactions of the homeodomain of NKX2.5 with DNA, and how these interactions relate to one of the transcription factor's primary function - heart development.
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The transcription factor, '''NKX2.5''' is one of many proteins classified as a homeodomain, and functions to regulate structural development in eukaryotes. These proteins share a characteristic evolutionarily conserved fold containing <scene name='91/911264/Three_alpha_helices/2'>three alpha-helices</scene>. <ref name="WJ"> PMID: 7979246 </ref>. DNA-binding is mediated through the insertion of the C-terminal side <scene name='91/911264/Major_groove_interaction/4'>alpha-helix</scene> (alpha-3) into the major groove, allowing for base-reside interactions. This allows homeodomains to locate and bind specific DNA sequences, leading to transcriptional activation or repression <ref> PMID: 26464018 </ref>. The homeodomain of NKX2.5 is flanked by both a N and C-terminal regulatory domain. This puts the biological protein at 324 residues with the homeodomain consisting of residues 138-197 <ref> PMID: 22849347 </ref> Research into the structure and function of NKX2.5 has mainly been focused on the DNA-binding homeodomain, as mutations in this region have been linked to specific diseases <ref name="Schott"> PMID: 9651244</ref>. This page will focus on the specific interactions of the homeodomain of NKX2.5 with DNA, and how these interactions relate to one of the transcription factor's primary function - heart development.
= Clinical Relevance =
= Clinical Relevance =

Revision as of 09:26, 16 January 2023

PDB ID 3rkq

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Proteopedia Page Contributors and Editors (what is this?)

William J Simard, Michal Harel

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