PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16884719-1 2006 We investigate the hypothesis that heparin activates antithrombin (AT) by relieving electrostatic strain within helix D. Mutation of residues K125 and R129 to either Ala or Glu abrogated heparin binding, but did not activate AT towards inhibition of factors IXa or Xa. Alanine 166-169 serpin family C member 1 Homo sapiens 53-65 10037709-3 1999 Protection from inhibition by antithrombin and heparin cofactor II requires ligation of both exosites 1 and 2 because minimal protection is seen when exosite 1 variants (gamma-thrombin and thrombin Quick 1) or an exosite 2 variant (Arg93 --> Ala, Arg97 --> Ala, and Arg101 --> Ala thrombin) is substituted for thrombin. Alanine 245-248 serpin family C member 1 Homo sapiens 30-42 12578831-4 2003 Replacement of His-334 in alpha(1)-antitrypsin by a serine or alanine at pH 7.4 results in the same polymerization and loop-peptide acceptance observed with antithrombin at low pH. Alanine 62-69 serpin family C member 1 Homo sapiens 157-169 10037709-3 1999 Protection from inhibition by antithrombin and heparin cofactor II requires ligation of both exosites 1 and 2 because minimal protection is seen when exosite 1 variants (gamma-thrombin and thrombin Quick 1) or an exosite 2 variant (Arg93 --> Ala, Arg97 --> Ala, and Arg101 --> Ala thrombin) is substituted for thrombin. Alanine 263-266 serpin family C member 1 Homo sapiens 30-42 8026575-5 1994 We have measured the stability to denaturation of one of these non-inhibitor substrate mutants, antithrombin-Hamilton, which has an Ala-->Thr change at position P12 in strand s4A. Alanine 132-135 serpin family C member 1 Homo sapiens 96-108 9493570-1 1998 Thirty-one individuals from 18 unrelated families with antithrombin deficiency have been identified as having a single point mutation within codon 384 (13268 GCA-->TCA) resulting in an alanine to serine substitution. Alanine 188-195 serpin family C member 1 Homo sapiens 55-67 8026575-6 1994 We find that it undergoes the transformation to the more stable form which is observed for inhibitor serpins, from which we conclude that the Ala-->Thr change in antithrombin-Hamilton does not prevent insertion of s4A into beta-sheet A in the cleaved form. Alanine 142-145 serpin family C member 1 Homo sapiens 165-177 8176841-8 1994 The antithrombin III binding activity of endothelial cells decreased after preincubation with homocysteine, cysteine, or 2-mercaptoethanol, containing a sulfhydryl group; no reduction in binding activity was observed after preincubation with methionine, alanine. Alanine 254-261 serpin family C member 1 Homo sapiens 4-20 1604438-0 1992 A useful restriction analysis for the determination of human antithrombin III variants with mutations from Ala 382 to Ala 384. Alanine 107-110 serpin family C member 1 Homo sapiens 61-77 8376590-7 1993 The antithrombin III binding activity of endothelial cells decreased after preincubation with 1 mM homocysteine, cysteine, or 2-mercaptoethanol; no reduction in binding activity was observed after preincubation with the same concentration of methionine, alanine, or valine. Alanine 254-261 serpin family C member 1 Homo sapiens 4-20 1604438-0 1992 A useful restriction analysis for the determination of human antithrombin III variants with mutations from Ala 382 to Ala 384. Alanine 118-121 serpin family C member 1 Homo sapiens 61-77 1911389-13 1991 The present results with antithrombin Glasgow II suggest that all the alanine residues at the base of the reactive site loop in positions P12-10 may be important for the formation of a stabilized inhibitor-thrombin complex. Alanine 70-77 serpin family C member 1 Homo sapiens 25-37 3305015-14 1987 The results reveal that Glu-Gly (residues 34-35), Glu-Ala (residues 42-43) and Glu-Leu (residues 50-51) are three preferential cleavage sites for V8 protease and their cleavage, especially the Glu-Ala and the Glu-Leu sites, was drastically inhibited when antithrombin III was preincubated with heparin. Alanine 54-57 serpin family C member 1 Homo sapiens 255-271 3305015-14 1987 The results reveal that Glu-Gly (residues 34-35), Glu-Ala (residues 42-43) and Glu-Leu (residues 50-51) are three preferential cleavage sites for V8 protease and their cleavage, especially the Glu-Ala and the Glu-Leu sites, was drastically inhibited when antithrombin III was preincubated with heparin. Alanine 197-200 serpin family C member 1 Homo sapiens 255-271 1690736-5 1990 By analyzing a CNBr fragment of the thrombin-antithrombin III complex that reacts with the antibody we localized the epitope for the antibody to a strongly hydrophobic residue 382-386 peptide segment, Ala-Ala-Ala-Ser-Thr, of the inhibitor, which is also contiguous with a hydrophobic amino acid Ala at its carboxyl terminus. Alanine 201-204 serpin family C member 1 Homo sapiens 45-61 3179438-9 1988 Codon 382 codes for alanine in the normal allele and for threonine in the antithrombin-III-Hamilton allele. Alanine 20-27 serpin family C member 1 Homo sapiens 74-90 3179438-11 1988 We postulate that, as a result of the substitution of threonine for alanine in antithrombin-III-Hamilton, either the tertiary structure or the hydrophobicity of the thrombin-binding region is altered, causing aberrant conformation of the Arg-393-Ser-394 bond at the reactive center impairing the interaction between antithrombin-III-Hamilton and the activated serine proteases. Alanine 68-75 serpin family C member 1 Homo sapiens 79-95 3179438-11 1988 We postulate that, as a result of the substitution of threonine for alanine in antithrombin-III-Hamilton, either the tertiary structure or the hydrophobicity of the thrombin-binding region is altered, causing aberrant conformation of the Arg-393-Ser-394 bond at the reactive center impairing the interaction between antithrombin-III-Hamilton and the activated serine proteases. Alanine 68-75 serpin family C member 1 Homo sapiens 316-332 24068708-7 2013 These findings suggest that in WT antithrombin there are two major complementary sources of conformational activation of antithrombin, probably involving altered contacts of side chains of Tyr-131 and Ala-134 with core hydrophobic residues, whereas the reactive center loop hinge expulsion plays only a minor additional role. Alanine 201-204 serpin family C member 1 Homo sapiens 34-46 24068708-7 2013 These findings suggest that in WT antithrombin there are two major complementary sources of conformational activation of antithrombin, probably involving altered contacts of side chains of Tyr-131 and Ala-134 with core hydrophobic residues, whereas the reactive center loop hinge expulsion plays only a minor additional role. Alanine 201-204 serpin family C member 1 Homo sapiens 121-133