Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.2.1.31 (beta-glucuronidase)
 7,680 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This methodological study aims to evaluate the efficacy of methods used for determining ovulation in a natural family planning in comparison with pelvic ultrasonography. Prospective analysis of ovulation detection methods was conducted with 40 women. Ovulation-detection methods employed in the study include transvaginal ultrasonography, daily morning urinary luteinizing hormone (LH) determinations, determination of salivary beta-glucuronidase activity, salivary ferning test, determination of cervical mucus levels and characteristics, and measurement of rectal or oral basal body temperature. Results revealed a 100% correlation between urinary LH level and ovulation diagnosis obtained from ultrasonographic examination. Other ovulation-detection methods contain the following correlation results: mucus sensations and characteristics, 48.3%; alpha-glucuronidase, 27.7%; and salivary ferning test, 36.8%. These findings draw the researchers to conclude that self-determination of LH levels could be an excellent method in ovulation determination.
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PMID:Efficacy of methods for determining ovulation in a natural family planning program. 1118 22

The 2A/2B cleavage of aphtho- and cardiovirus 2A polyproteins is mediated by their 2A proteins 'cleaving' at their own C termini. We have analysed this activity using artificial reporter polyprotein systems comprising green fluorescent protein (GFP) linked via foot-and-mouth disease virus (FMDV) 2A to beta-glucuronidase (GUS) -- forming a single, long, open reading frame. Analysis of the distribution of radiolabel showed a high proportion of the in vitro translation products (approximately 90%) were in the form of the 'cleavage' products GUS and [GFP2A]. Alternative models have been proposed to account for the 'cleavage' activity: proteolysis by a host-cell proteinase, autoproteolysis or a translational effect. To investigate the mechanism of this cleavage event constructs encoding site-directed mutant and naturally occurring '2A-like' sequences were used to program in vitro translation systems and the gel profiles analysed. Analysis of site-directed mutant 2A sequences showed that 'cleavage' occurred in constructs in which all the candidate nucleophilic residues were substituted -- with the exception of aspartate-12. This residue is not, however, conserved amongst all functional '2A-like' sequences. '2A-like' sequences were identified within insect virus polyproteins, the NS34 protein of type C rotaviruses, repeated sequences in Trypanosoma spp. and a eubacterial alpha-glucosiduronasesequence(Thermatoga maritima aguA). All of the 2A-like sequences analysed were active (to various extents), other than the eubacterial alpha-glucosiduronase 2A-like sequence. This method of control of protein biogenesis may well not, therefore, be confined to members of the PICORNAVIRIDAE: Taken together, these data provide additional evidence that neither FMDV 2A nor '2A-like' sequences are autoproteolytic elements.
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PMID:The 'cleavage' activities of foot-and-mouth disease virus 2A site-directed mutants and naturally occurring '2A-like' sequences. 1129 77