TATA box cytochrome superfamily: Difference between revisions

Jump to navigation Jump to search
VisualWikitext
(Created page with "The '''TATA box''' (also called '''Goldberg-Hogness box''')<ref name=Lifton>{{ cite journal | author = R. P. Lifton, M. L. Goldberg, R. W. Karp, and D. S. Hogness | year = 1978 | title = The organization of the histone genes in Drosophila melanogaster: functional and evolutionary implications | url = https://symposium.cshlp.org/content/42/1047.extract | journal = Cold Spring Harbor Symposia on Quantitative Biology | volume = 42 | issue = | pages = 1047–51 | doi = 10.11...")
 
 
Line 160: Line 160:
|url=http://www.ncbi.nlm.nih.gov/gene/1581
|url=http://www.ncbi.nlm.nih.gov/gene/1581
|accessdate=2024-06-19 }}</ref>
|accessdate=2024-06-19 }}</ref>
===Gene ID: 6916===
"This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. However, this protein is considered a member of the cytochrome P450 superfamily on the basis of sequence similarity rather than functional similarity. This endoplasmic reticulum membrane protein catalyzes the conversion of prostglandin H2 to thromboxane A2, a potent vasoconstrictor and inducer of platelet aggregation. The enzyme plays a role in several pathophysiological processes including hemostasis, cardiovascular disease, and stroke. Alternatively spliced transcript variants encoding different isoforms have been found for this gene."<ref name=RefSeq6916>{{ cite web
|author=RefSeq
|title=TBXAS1 thromboxane A synthase 1 [ Homo sapiens ]
|publisher=ncbi.nlm.nih
|location=Bethsda, Maryland, USA
|date=August 2008
|url=http://www.ncbi.nlm.nih.gov/gene/6916
|accessdate=2024-07-10 }}</ref>


==Families of TATA box genes==
==Families of TATA box genes==

Latest revision as of 22:17, 10 July 2024

The TATA box (also called Goldberg-Hogness box)[1] is a DNA sequence (cis-regulatory element) found in the promoter region of genes in archaea and eukaryotes;[2] approximately 24% of human genes contain a TATA box within the core promoter.[3]

Human genes

Main article: Human genes

"TATA-containing genes are more often highly regulated, such as by biotic or stress stimuli."[4] Only "∼10% of these TATA-containing promoters have the canonical TATA box (TATAWAWR)."[4]

"SRF-regulated genes of the actin/cytoskeleton/contractile family tend to have a TATA box."[5]

Different "TATA box sequences have different abilities to convey the activating signals of certain enhancers and activators in mammalian cells [...] and in yeast [...]."[5]

"SRF is a well established master regulator of the specific family of genes encoding the actin cytoskeleton and contractile apparatus [...], and we found that ~40% of the core promoters for these genes contain a TATA box, which is a significant enrichment compared to the low overall frequency of TATA-containing promoters in human and mouse genomes (...)."[5] "Global frequencies of core promoter types for human [9010 orthologous mouse-human promoter pairs with 1848 TATA-containing or 7162 TATA-less][6] genes with experimentally validated transcription start sites [are known from 2006]."[5] "The TATA box [...] has a consensus sequence of TATAWAAR [...]."[5] W = A or T and R = A or G. We "estimate that ~17% of promoters contain a TATA box".[6]

Gene ID: 1543

"This gene, CYP1A1, encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and its expression is induced by some polycyclic aromatic hydrocarbons (PAHs), some of which are found in cigarette smoke. The enzyme's endogenous substrate is unknown; however, it is able to metabolize some PAHs to carcinogenic intermediates. The gene has been associated with lung cancer risk. A related family member, CYP1A2, is located approximately 25 kb away from CYP1A1 on chromosome 15. Alternative splicing results in multiple transcript variants encoding distinct isoforms."[7]

Gene ID: 1544

"This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. The protein encoded by this gene localizes to the endoplasmic reticulum and its expression is induced by some polycyclic aromatic hydrocarbons (PAHs), some of which are found in cigarette smoke. The enzyme's endogenous substrate is unknown; however, it is able to metabolize some PAHs to carcinogenic intermediates. Other xenobiotic substrates for this enzyme include caffeine, aflatoxin B1, and acetaminophen. The transcript from this gene contains four Alu sequences flanked by direct repeats in the 3' untranslated region."[8]

Gene ID: 1548

"This gene, CYP2A6, encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and its expression is induced by phenobarbital. The enzyme is known to hydroxylate coumarin, and also metabolizes nicotine, aflatoxin B1, nitrosamines, and some pharmaceuticals. Individuals with certain allelic variants are said to have a poor metabolizer phenotype, meaning they do not efficiently metabolize coumarin or nicotine. This gene is part of a large cluster of cytochrome P450 genes from the CYP2A, CYP2B and CYP2F subfamilies on chromosome 19q. The gene was formerly referred to as CYP2A3; however, it has been renamed CYP2A6."[9]

Gene ID: 1553

"This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum. Although its endogenous substrate has not been determined, it is known to metabolize 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone, a major nitrosamine specific to tobacco. This gene is part of a large cluster of cytochrome P450 genes from the CYP2A, CYP2B and CYP2F subfamilies on chromosome 19q."[10]

Gene ID: 1571

"This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and is induced by ethanol, the diabetic state, and starvation. The enzyme metabolizes both endogenous substrates, such as ethanol, acetone, and acetal, as well as exogenous substrates including benzene, carbon tetrachloride, ethylene glycol, and nitrosamines which are premutagens found in cigarette smoke. Due to its many substrates, this enzyme may be involved in such varied processes as gluconeogenesis, hepatic cirrhosis, diabetes, and cancer."[11]

Gene ID: 1576

"This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases that catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and its expression is induced by glucocorticoids and some pharmacological agents. This enzyme is involved in the metabolism of approximately half the drugs in use today, including acetaminophen, codeine, cyclosporin A, diazepam, erythromycin, and chloroquine. The enzyme also metabolizes some steroids and carcinogens. This gene is part of a cluster of cytochrome P450 genes on chromosome 7q21.1. Previously another CYP3A gene, CYP3A3, was thought to exist; however, it is now thought that this sequence represents a transcript variant of CYP3A4. Alternatively spliced transcript variants encoding different isoforms have been identified."[12]

Gene ID: 1581

"This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases that catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and its expression is induced by glucocorticoids and some pharmacological agents. This enzyme is involved in the metabolism of approximately half the drugs in use today, including acetaminophen, codeine, cyclosporin A, diazepam, erythromycin, and chloroquine. The enzyme also metabolizes some steroids and carcinogens. This gene is part of a cluster of cytochrome P450 genes on chromosome 7q21.1. Previously another CYP3A gene, CYP3A3, was thought to exist; however, it is now thought that this sequence represents a transcript variant of CYP3A4. Alternatively spliced transcript variants encoding different isoforms have been identified."[13]

Gene ID: 6916

"This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. However, this protein is considered a member of the cytochrome P450 superfamily on the basis of sequence similarity rather than functional similarity. This endoplasmic reticulum membrane protein catalyzes the conversion of prostglandin H2 to thromboxane A2, a potent vasoconstrictor and inducer of platelet aggregation. The enzyme plays a role in several pathophysiological processes including hemostasis, cardiovascular disease, and stroke. Alternatively spliced transcript variants encoding different isoforms have been found for this gene."[14]

Families of TATA box genes

Main article: Families of TATA box genes

Acknowledgements

The content on this page was first contributed by: Henry A. Hoff.

References

  1. ↑ R. P. Lifton, M. L. Goldberg, R. W. Karp, and D. S. Hogness (1978). "The organization of the histone genes in Drosophila melanogaster: functional and evolutionary implications". Cold Spring Harbor Symposia on Quantitative Biology. 42: 1047–51. doi:10.1101/SQB.1978.042.01.105. PMID 98262.
  2. ↑ Stephen T. Smale and James T. Kadonaga (July 2003). "The RNA Polymerase II Core Promoter" (PDF). Annual Review of Biochemistry. 72 (1): 449–79. doi:10.1146/annurev.biochem.72.121801.161520. PMID 12651739. Retrieved 2012-05-07.
  3. ↑ C Yang, E Bolotin, T Jiang, FM Sladek, E Martinez (March 2007). "Prevalence of the initiator over the TATA box in human and yeast genes and identification of DNA motifs enriched in human TATA-less core promoters". Gene. 389 (1): 52–65. doi:10.1016/j.gene.2006.09.029. PMID 17123746.
  4. ↑ 4.0 4.1 Chuhu Yang, Eugene Bolotin, Tao Jiang, Frances M. Sladek, and Ernest Martinez (10 October 2006). "Prevalence of the Initiator over the TATA box in human and yeast genes and identification of DNA motifs enriched in human TATA-less core promoters". Gene. 389 (1): 52–65. doi:10.1016/j.gene.2006.09.029. PMID 17123746. Retrieved 2024-06-07.
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Muyu Xu, Elsie Gonzalez-Hurtado, and Ernest Martinez (April 2016). "Core promoter-specific gene regulation: TATA box selectivity and Initiator-dependent bi-directionality of serum response factor-activated transcription". Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms. 1859 (4): 553–563. doi:10.1016/j.bbagrm.2016.01.005. Retrieved 2024-06-08.
  6. ↑ 6.0 6.1 Victor X Jin, Gregory AC Singer, Francisco J Agosto-Pérez, Sandya Liyanarachchi, and Ramana V Davuluri (2006). "Genome-wide analysis of core promoter elements from conserved human and mouse orthologous pairs". BMC Bioinformatics. 7: 114. doi:10.1186/1471-2105-7-114. Retrieved 2024-06-09.
  7. ↑ RefSeq (January 2016). "CYP1A1 cytochrome P450 family 1 subfamily A member 1 [ Homo sapiens ]". Bethsda, Maryland, USA: ncbi.nlm.nih. Retrieved 2024-06-19.
  8. ↑ RefSeq (July 2008). "CYP1A2 cytochrome P450 family 1 subfamily A member 2 [ Homo sapiens ]". Bethsda, Maryland, USA: ncbi.nlm.nih. Retrieved 2024-06-18.
  9. ↑ RefSeq (July 2008). "CYP2A6 cytochrome P450 family 2 subfamily A member 6 [ Homo sapiens ]". Bethsda, Maryland, USA: ncbi.nlm.nih. Retrieved 2024-06-19.
  10. ↑ RefSeq (July 2008). "CYP2A13 cytochrome P450 family 2 subfamily A member 13 [ Homo sapiens ]". Bethsda, Maryland, USA: ncbi.nlm.nih. Retrieved 2024-06-19.
  11. ↑ RefSeq (July 2008). "CYP2E1 cytochrome P450 family 2 subfamily E member 1 [ Homo sapiens ]". Bethsda, Maryland, USA: ncbi.nlm.nih. Retrieved 2024-06-18.
  12. ↑ RefSeq (August 2020). "CYP3A4 cytochrome P450 family 3 subfamily A member 4 [ Homo sapiens ]". Bethsda, Maryland, USA: ncbi.nlm.nih. Retrieved 2024-06-19.
  13. ↑ RefSeq (August 2020). "CYP3A4 cytochrome P450 family 3 subfamily A member 4 [ Homo sapiens ]". Bethsda, Maryland, USA: ncbi.nlm.nih. Retrieved 2024-06-19.
  14. ↑ RefSeq (August 2008). "TBXAS1 thromboxane A synthase 1 [ Homo sapiens ]". Bethsda, Maryland, USA: ncbi.nlm.nih. Retrieved 2024-07-10.

External links


Retrieved from "https://www.wikidoc.org/index.php?title=TATA_box_cytochrome_superfamily&oldid=1738698"