(1) Further analysis with two other synthetic peptides (212Cys to 222Glu and Cys X 221Ile to 236Glu) indicated that the dodecapeptide Ile-Glu-Phe-Gln-Lys-Asn-Asn-Arg-Leu-Leu-Glu mimicked either the whole or a major part of the neutralization epitope.
(2) In contrast, strains carrying the substitutions Ile-30----Phe, Gly-33----Leu, Gly-58----Leu, and Lys-34----Val and the Lys-34----Val, Glu-37----Gln double substitution were found to possess a coupled phenotype similar to that of the wild type.
(3) The commercially available chromogenic p-nitroanilide substrates Pro-Phe-Arg-NH-Np (S2302 or chromozym PK), Glp-Pro-Arg-NH-Np (S2366), Ile-Glu-(piperidyl)-Gly-Arg-NH-Np (S2337), and Ile-Glu-Gly-Arg-NH-Np (S2222) were tested for their suitability as substrates in these assays.
(4) We have named them bombolitin I (Ile-Lys-Ile-Thr-Thr-Met-Leu-Ala-Lys-Leu-Gly-Lys-Val-Leu-Ala-His-Val-NH2 ), bombolitin II (Ser-Lys-Ile-Thr-Asp-Ile-Leu-Ala-Lys-Leu-Gly-Lys-Val-Leu-Ala-His-Val-NH2 ), bombolitin III (Ile-Lys-Ile-Met-Asp-Ile-Leu-Ala-Lys-Leu-Gly-Lys-Val-Leu-Ala-His-Val-NH2 ), bombolitin IV (Ile-Asn-Ile-Lys-Asp-Ile-Leu-Ala-Lys-Leu-Val-Lys-Val-Leu-Gly-His-Val-NH2 ), and bombolitin V (Ile-Asn-Val-Leu-Gly-Ile-Leu-Gly-Leu-Leu-Gly-Lys-Ala-Leu-Ser-His-Leu-NH2 ).
(5) Ile-tRNA synthetase shows little inactivation in either process.
(6) Structurally altered polymorphic variants with reduced activity, such as tetrameric interface mutant Ile-58 to Thr, may produce not only an early selective advantage, through enhanced cytotoxicity of tumor necrosis factor for virus-infected cells, but also detrimental effects from increased mitochondrial oxidative damage, contributing to degenerative conditions, including diabetes, aging, and Parkinson's and Alzheimer's diseases.
(7) The minimal length for an effective substrate has been characterised as an octapeptide sequence derived from the amino terminal portion of angiotensinogen (residues 6----13): His-Pro-Phe-His-Leu-Val-Ile-His (Leu-Val is the scissile bond).
(8) The lipid-mobilizing activity of a synthetic peptide, NH2-Phe-Glu-Glu-Ala-Tyr-Ile-Pro-Lys-Glu-Gln-Lys-Tyr-Ser-Phe-COOH, corresponding to the 31-44 amino-acid sequence of human growth hormone, was studied.
(9) The structures of two crystal forms of Boc-Trp-Ile-Ala-Aib-Ile-Val-Aib-Leu-Aib-Pro-OMe have been determined.
(10) The alpha His58(E7) to Gly and Val62(E11) to Ala substitutions caused 80- and 3-fold increases, respectively, in k'CO for T-state alpha subunits, and the alpha Val62(E11) to Ile mutation caused a 3-fold decrease.
(11) Resonances from several amino acids including His 16, Gly 24, Ile 48, and Met 61 experience strong ring-current shifts due to their placement near the heme.
(12) The terminal sequences are: NH2-Ile-Val-Gly-Gly-Ile-Asp.....Gly-Lys-Tyr-Pro-Tyr-Gln-Val-Ser-Leu-Arg-COOH.
(13) Peptide mapping and amino acid sequence analyses have revealed that Val-406 of IgG1 carrying allotype a is substituted for Ile in the case of allotype j. X-ray crystallographic data indicate that Met-398 is in close spatial proximity to Val (Ile)-406.
(14) Site-directed mutation of codon 203 and transient expression of these cDNA in COS-7 cells indicated that Phe, Ile, Leu, and Val permit transmembrane expression, whereas Ser, Thr, Tyr, Asn, Gly, Ala, Asp and Lys enable phosphatidylinositol-glycan attachment.
(15) The N-terminal amino acid sequence of this sialidase, Ala-Asp-X-Ile-Phe-Val-Arg-Glu-Thr-Arg-Ile-Pro-, was determined.
(16) Supplementation of the low protein diet with a synthetic mixture of branched-chain AA (Val, Leu and Ile) normalized the plasma levels of these AA.
(17) They correspond to the sequence from Leu-149 to Ile-162.
(18) The N5 atom of flavin interacts with the amide NH of Ile 59 in A.
(19) Chymotrypsin cleavage of this peptide resulted in a single-labeled fragment with the sequence: Glu-Val-Ala-Asn-(Pyridoxal-P-Lys)-Val-Gly-Gly-Ile-Tyr.
(20) Both sarcosine-isoleucine-angiotensin II ([Sar, Ile]-ANG II) and atropine blocked, and nadolol increased, the effect of EFS and exogenous angiotensin II on serotonin production.
Isoleucine
Definition:
Example Sentences:
(1) Isotope competition studies indicated that the pathway was regulated by isoleucine.
(2) The rank order of potency of the peptides tested was VIP greater than rat (r) peptide histidine isoleucine = human (h) PHI greater than rGRF greater than bovine GRF = porcine PHI = VIP-(10-28) greater than hGRF greater than secretin greater than apamin greater than glucagon.
(3) The remaining amino acids are mainly hydrophobic (isoleucine, leucine, and phenylalanine).
(4) An A-to-T transversion, which substitutes asparagine16 with isoleucine (N16I), was identified.
(5) To gain further insight into the side chain requirement at position 177 that confers maltose recognition, further substitutions of isoleucine, leucine, phenylalanine, proline, and serine have been made via site-directed mutagenesis.
(6) This enzyme produces alpha-ketoisovaleric and alpha-keto-beta-methylvaleric acids, respectively, in the biosynthesis of valine and isoleucine.
(7) Metabolism of L-isoleucine, L-alloisoleucine and corresponding 2-oxo acids in rat hind limb muscle was comparatively studied under steady-state perfusion conditions.
(8) The mutation in the ilvA gene decreases the activity of threonine deaminase, and thus results in partial isoleucine auxotrophy, and finally, the reversion in the relA gene restores the stringent amino acid control of RNA synthesis in threonine producer cells.
(9) From the regression coefficients it was calculated that, for the accretion of 1 g body protein, the dietary amino acid requirements were (mg) threonine 47, valine 53, methionine + cystine 36, methionine 19, isoleucine 43, leucine 78, phenylalanine + tyrosine 84, phenylalanine 41, lysine 68 and tryptophan 12.
(10) The hepatic balance for valine, leucine and isoleucine has been measured in anaesthetized virgin controls and 9 and 12-day pregnant rats.
(11) Asparagine, arginine, isoleucine and phenylalanine administered under the stimulation of secretin-pancreozymin significantly inhibited the secretion of pancreatic juice by 23%, 15%, 13% and 13%, and the output of amylase by 53%, 37%, 27% and 18%, respectively.
(12) A disorder of isoleucine catabolism was found in a child with intermittent metabolic acidosis.
(13) This shows that histidine can be effectively replaced by isoleucine in a preservation solution and gives equivalent preservation results.
(14) Isoleucine deprivation arrested growth of ts SV3T3 cells, but these cells, as well as normal 3T3, did not accumulate in G1 and continued to express T-antigen.
(15) Nucleotide sequencing of the E coding region for the mutants revealed single base changes in both r30 and r27 resulting in a predicted change from isoleucine to serine at position 270 in r30 and from glycine to aspartic acid at position 333 in r27.
(16) When this strain is grown on minimal medium containing appropriate supplements (which include a nonrepressing concentration of isoleucine), or on minimal medium supplemented with isoleucylglycine (which acts as a limiting source of isoleucine), acetohydroxy acid synthetase remains repressed.
(17) After 20 days, the plasma concentrations of methionine and the branched chain amino acids (BCAA), valine, isoleucine, and leucine were increased in diabetic rats.
(18) Furthermore, E. coli strains deficient for IHF are compromised for isoleucine and valine biosynthesis (Friden, P., Voelkel, K., Sternglantz, R., and Freundlich, M. (1984) J. Mol.
(19) In sepsis, perfusion with leucine and isoleucine resulted in a mild improvement in systolic function.
(20) After 48 h, media were replaced by incorporation media containing [14C]isoleucine and [3H]tryptophan and incubated for an additional 8 h under otherwise identical conditions.