ID:NKX25_HUMAN DESCRIPTION: RecName: Full=Homeobox protein Nkx-2.5; AltName: Full=Cardiac-specific homeobox; AltName: Full=Homeobox protein CSX; AltName: Full=Homeobox protein NK-2 homolog E; FUNCTION: Implicated in commitment to and/or differentiation of the myocardial lineage. Acts as a transcriptional activator of ANF in cooperation with GATA4 (By similarity). SUBUNIT: Interacts with HIPK1 and HIPK2, but not HIPK3. Interacts with the C-terminal zinc finger of GATA4 through its homeobox domain. Also interacts with JARID2 which represses its ability to activate transcription of ANF. Interacts with FBLIM1 (By similarity). INTERACTION: Q99593-1:TBX5; NbExp=6; IntAct=EBI-936601, EBI-304423; SUBCELLULAR LOCATION: Nucleus (Probable). TISSUE SPECIFICITY: Expressed only in the heart. DISEASE: Defects in NKX2-5 are the cause of atrial septal defect type 7 with or without atrioventricular conduction defects (ASD7) [MIM:108900]. A congenital heart malformation characterized by incomplete closure of the wall between the atria resulting in blood flow from the left to the right atria, and atrioventricular conduction defects in some cases. DISEASE: Defects in NKX2-5 are a cause of tetralogy of Fallot (TOF) [MIM:187500]. TOF is a congenital heart anomaly which consists of pulmonary stenosis, ventricular septal defect, dextroposition of the aorta (aorta is on the right side instead of the left) and hypertrophy of the right ventricle. This condition results in a blue baby at birth due to inadequate oxygenation. Surgical correction is emergent. DISEASE: Defects in NKX2-5 are a cause of conotruncal heart malformations (CTHM) [MIM:217095]. CTMH is a group of congenital heart defects involving the outflow tracts. Examples include truncus arteriosus communis, double-outlet right ventricle and transposition of great arteries. Truncus arteriosus communis is characterized by a single outflow tract instead of a separate aorta and pulmonary artery. In transposition of the great arteries, the aorta arises from the right ventricle and the pulmonary artery from the left ventricle. In double outlet of the right ventricle, both the pulmonary artery and aorta arise from the right ventricle. DISEASE: Defects in NKX2-5 are the cause of congenital hypothyroidism non-goitrous type 5 (CHNG5) [MIM:225250]. CHNG5 is a non-autoimmune condition characterized by resistance to thyroid- stimulating hormone (TSH) leading to increased levels of plasma TSH and low levels of thyroid hormone. CHNG5 presents variable severity depending on the completeness of the defect. Most patients are euthyroid and asymptomatic, with a normal sized thyroid gland. Only a subset of patients develop hypothyroidism and present a hypoplastic thyroid gland. DISEASE: Defects in NKX2-5 are a cause of ventricular septal defect type 3 (VSD3) [MIM:614432]. VSD3 is a common form of congenital cardiovascular anomaly that may occur alone or in combination with other cardiac malformations. It can affect any portion of the ventricular septum, resulting in abnormal communications between the two lower chambers of the heart. Classification is based on location of the communication, such as perimembranous, inlet, outlet (infundibular), central muscular, marginal muscular, or apical muscular defect. Large defects that go unrepaired may give rise to cardiac enlargement, congestive heart failure, pulmonary hypertension, Eisenmenger's syndrome, delayed fetal brain development, arrhythmias, and even sudden cardiac death. DISEASE: Defects in NKX2-5 are a cause of hypoplastic left heart syndrome type 2 (HLHS2) [MIM:614435]. HLHS2 is a syndrome due to defective development of the aorta proximal to the entrance of the ductus arteriosus, and hypoplasia of the left ventricle and mitral valve. As a result of the abnormal circulation, the ductus arteriosus and foramen ovale are patent and the right atrium, right ventricle, and pulmonary artery are enlarged. SIMILARITY: Belongs to the NK-2 homeobox family. SIMILARITY: Contains 1 homeobox DNA-binding domain. WEB RESOURCE: Name=Atlas of Genetics and Cytogenetics in Oncology and Haematology; URL="http://atlasgeneticsoncology.org/Genes/NKX25ID42958ch5q35.html"; WEB RESOURCE: Name=GeneReviews; URL="http://www.ncbi.nlm.nih.gov/sites/GeneTests/lab/gene/NKX2-5";
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
ModBase Predicted Comparative 3D Structure on P52952
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Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.
BC025711 - Homo sapiens NK2 transcription factor related, locus 5 (Drosophila), mRNA (cDNA clone MGC:34495 IMAGE:5225103), complete cds. JD563211 - Sequence 544235 from Patent EP1572962. U34962 - Human transcription factor HCSX (hCsx) mRNA, complete cds. JD195698 - Sequence 176722 from Patent EP1572962. JD408498 - Sequence 389522 from Patent EP1572962. JD384202 - Sequence 365226 from Patent EP1572962. JD452254 - Sequence 433278 from Patent EP1572962. JD532656 - Sequence 513680 from Patent EP1572962. JD396356 - Sequence 377380 from Patent EP1572962. JD126069 - Sequence 107093 from Patent EP1572962. AK290615 - Homo sapiens cDNA FLJ76261 complete cds, highly similar to Homo sapiens NK2 transcription factor related, locus 5 (Drosophila) (NKX2-5), mRNA. JD052592 - Sequence 33616 from Patent EP1572962. JD542019 - Sequence 523043 from Patent EP1572962. DQ893313 - Synthetic construct clone IMAGE:100005943; FLH196050.01X; RZPDo839C08154D NK2 transcription factor related, locus 5 (Drosophila) (NKX2-5) gene, encodes complete protein. AB021133 - Homo sapiens Nkx-2.5 mRNA, complete cds. KJ896668 - Synthetic construct Homo sapiens clone ccsbBroadEn_06062 NKX2-5 gene, encodes complete protein. DQ894104 - Synthetic construct Homo sapiens clone IMAGE:100008564; FLH167757.01L; RZPDo839E1289D NK2 transcription factor related, locus 5 (Drosophila) (NKX2-5) gene, encodes complete protein. DQ896627 - Synthetic construct Homo sapiens clone IMAGE:100011087; FLH196046.01L; RZPDo839C08153D NK2 transcription factor related, locus 5 (Drosophila) (NKX2-5) gene, encodes complete protein. KU178001 - Homo sapiens NK2 transcription factor related locus 5 isoform 1 (NKX2-5) mRNA, partial cds. KU178002 - Homo sapiens NK2 transcription factor related locus 5 isoform 2 (NKX2-5) mRNA, complete cds. AB464641 - Synthetic construct DNA, clone: pF1KB8950, Homo sapiens NKX2-5 gene for NK2 transcription factor related, locus 5, without stop codon, in Flexi system. AK309495 - Homo sapiens cDNA, FLJ99536. AK297844 - Homo sapiens cDNA FLJ52202 complete cds, highly similar to Homeobox protein Nkx-2.5. AK307249 - Homo sapiens cDNA, FLJ97197. AK307218 - Homo sapiens cDNA, FLJ97166. AK307247 - Homo sapiens cDNA, FLJ97195. LF212701 - JP 2014500723-A/20204: Polycomb-Associated Non-Coding RNAs. CU693024 - Synthetic construct Homo sapiens gateway clone IMAGE:100016706 5' read NKX2-5 mRNA. JD365148 - Sequence 346172 from Patent EP1572962. JD159580 - Sequence 140604 from Patent EP1572962. JD549000 - Sequence 530024 from Patent EP1572962. MA448278 - JP 2018138019-A/20204: Polycomb-Associated Non-Coding RNAs.
Biochemical and Signaling Pathways
BioCarta from NCI Cancer Genome Anatomy Project h_nfatPathway - NFAT and Hypertrophy of the heart (Transcription in the broken heart) h_hopPathway - Hop Pathway in Cardiac Development h_alkPathway - ALK in cardiac myocytes