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Regulation of methionine biosynthesis in Escherichia coli: mapping of the metJ locus and properties of a metJ plus-metJ minus diploid.

Proceedings of the National Academy of Sciences of the United States of America

Su CH, Greene RC.
PMID: 5277087
Proc Natl Acad Sci U S A. 1971 Feb;68(2):367-71. doi: 10.1073/pnas.68.2.367.
Free PMC Article

MetJ(-) mutants of Escherichia coli have elevated nonrepressible levels of the enzymes of methionine biosynthesis and S-adenosylmethionine synthetase (ATP:L-methionine S-adenosyltransferase, EC 2.5.1.6). In E. coli, as in Salmonella typhimurium, the metJ locus is close to metB (95% cotransduction of...

γ-Glutamyl hydrolase modulation significantly influences global and gene-specific DNA methylation and gene expression in human colon and breast cancer cells.

Genes & nutrition

Kim SE, Hinoue T, Kim MS, Sohn KJ, Cho RC, Cole PD, Weisenberger DJ, Laird PW, Kim YI.
PMID: 25502219
Genes Nutr. 2015 Jan;10(1):444. doi: 10.1007/s12263-014-0444-0. Epub 2014 Dec 13.

γ-Glutamyl hydrolase (GGH) plays an important role in folate homeostasis by catalyzing hydrolysis of polyglutamylated folate into monoglutamates. Polyglutamylated folates are better substrates for several enzymes involved in the generation of S-adenosylmethionine, the primary methyl group donor, and hence,...

As(III) S-adenosylmethionine methyltransferases and other arsenic binding proteins.

Geomicrobiology journal

Ajees AA, Rosen BP.
PMID: 26366023
Geomicrobiol J. 2015;32(7):570-576. doi: 10.1080/01490451.2014.908983.

Efflux is by far the most common means of arsenic detoxification is by methylation catalyzed by a family of As(III) S-adenosylmethionine (SAM) methyltransferases (MTs) enzymes designated ArsM in microbes or AS3MT in higher eukaryotes. The protein sequence of more...

Caspase-like activity during aging and cell death in the toxic dinoflagellate Karenia brevis.

Harmful algae

Johnson JG, Janech MG, Van Dolah FM.
PMID: 28040110
Harmful Algae. 2014 Jan;31:41-53. doi: 10.1016/j.hal.2013.08.005. Epub 2013 Oct 20.

The observation of caspase-like activity during cell death has provided a new framework for understanding the evolutionary and ecological contexts of programmed cell death in phytoplankton. However, additional roles for this caspase-like activity, the enzymes responsible, and the targets...

Clinical Trial of 24 Hours' Treatment with Glutathione Precursors in Acute Pancreatitis.

Clinical drug investigation

Sharer NM, Scott PD, Deardon DJ, Lee SH, Taylor PM, Braganza JM.
PMID: 27519198
Clin Drug Investig. 1995 Sep;10(3):147-57. doi: 10.2165/00044011-199510030-00003.

The depletion of thiols in pancreatic acinar cells, as a consequence of oxidative stress, seems to underlie acute pancreatitis. Therefore, immediate parenteral treatment with agents to refurbish tissue thiols should accelerate recovery. We tested this hypothesis in a randomised...

Novel regulatory roles of omega-3 fatty acids in metabolic pathways: a proteomics approach.

Nutrition & metabolism

Ahmed AA, Balogun KA, Bykova NV, Cheema SK.
PMID: 24438320
Nutr Metab (Lond). 2014 Jan 17;11(1):6. doi: 10.1186/1743-7075-11-6.

BACKGROUND: Omega-3 polyunsaturated fatty acids (n-3 PUFA) have been shown to alleviate the symptoms of metabolic disorders, such as heart disease, diabetes, obesity and insulin resistance. Several putative mechanisms by which n-3 PUFA elicit beneficial health effects have been...

Sex-Dependent effects of developmental arsenic exposure on methylation capacity and methylation regulation of the glucocorticoid receptor system in the embryonic mouse brain.

Toxicology reports

Allan AM, Hafez AK, Labrecque MT, Solomon ER, Shaikh MN, Zheng X, Ali A.
PMID: 26855884
Toxicol Rep. 2015 Oct;2:1376-1390. doi: 10.1016/j.toxrep.2015.10.003.

Previously we have shown that prenatal moderate arsenic exposure (50 ppb) disrupts glucocorticoid receptor (GR) programming and that these changes continue into adolescence in males. However, it was not clear what the molecular mechanisms were promoting these GR programming...

Potential Misdiagnosis of Hyperhomocysteinemia due to Cystathionine Beta-Synthase Deficiency During Pregnancy.

JIMD reports

Stabler SP, Freehauf C, Allen RH, Thomas J, Gallagher R.
PMID: 28275971
JIMD Rep. 2017;37:55-61. doi: 10.1007/8904_2017_15. Epub 2017 Mar 09.

Extreme hyperhomocysteinemia with low cystathionine and cysteine is virtually diagnostic of cystathionine beta-synthase (CBS) deficiency since remethylation defects and hypermethioninemia due to other inborn errors cause elevated serum cystathionine. However, a pregnant CBS deficient patient was found to have...

The Effect of S-Adenosylmethionine on Self-Mutilation in a Patient with Lesch-Nyhan Disease.

JIMD reports

Lauber M, Plecko B, Pfiffner M, Nuoffer JM, Häberle J.
PMID: 27295197
JIMD Rep. 2017;32:51-57. doi: 10.1007/8904_2016_571. Epub 2016 Jun 14.

BACKGROUND: Lesch-Nyhan disease (LND) is an X-chromosomal disorder of purine metabolism characterized by hyperuricemia, dystonia, and self-mutilation, leading to an extremely high burden of disease in affected patients and families. Although allopurinol therapy can control hyperuricemia, it has no...

Mercury promotes catecholamines which potentiate mercurial autoimmunity and vasodilation: implications for inositol 1,4,5-triphosphate 3-kinase C susceptibility in kawasaki syndrome.

Korean circulation journal

Yeter D, Deth R, Kuo HC.
PMID: 24174958
Korean Circ J. 2013 Sep;43(9):581-91. doi: 10.4070/kcj.2013.43.9.581.

Previously, we reviewed biological evidence that mercury could induce autoimmunity and coronary arterial wall relaxation as observed in Kawasaki syndrome (KS) through its effects on calcium signaling, and that inositol 1,4,5-triphosphate 3-kinase C (ITPKC) susceptibility in KS would predispose...

Travels with carbon-centered radicals. 5'-deoxyadenosine and 5'-deoxyadenosine-5'-yl in radical enzymology.

Accounts of chemical research

Frey PA.
PMID: 24308628
Acc Chem Res. 2014 Feb 18;47(2):540-9. doi: 10.1021/ar400194k. Epub 2013 Dec 05.

As a graduate student under Professor R. H. Abeles, I began my journey with 5'-deoxyadenosine, studying the coenzyme B12 (adenosylcobalamin)-dependent dioldehydrase (DDH). I proved that suicide inactivation of dioldehydrase by glycolaldehyde proceeded with irreversible cleavage of adenosylcobalamin to 5'-deoxyadenosine....

Oxidative stress modulation in hepatitis C virus infected cells.

World journal of hepatology

Lozano-Sepulveda SA, Bryan-Marrugo OL, Cordova-Fletes C, Gutierrez-Ruiz MC, Rivas-Estilla AM.
PMID: 26692473
World J Hepatol. 2015 Dec 18;7(29):2880-9. doi: 10.4254/wjh.v7.i29.2880.

Hepatitis C virus (HCV) replication is associated with the endoplasmic reticulum, where the virus can induce cellular stress. Oxidative cell damage plays an important role in HCV physiopathology. Oxidative stress is triggered when the concentration of oxygen species in...

Showing 1 to 12 of 448 entries