{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,27]],"date-time":"2023-10-27T14:12:27Z","timestamp":1698415947079},"reference-count":29,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2006,7,11]],"date-time":"2006-07-11T00:00:00Z","timestamp":1152576000000},"content-version":"vor","delay-in-days":4209,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American J Hematol"],"published-print":{"date-parts":[[1995,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Abnormal antithrombin III (AT III) was found in a 30\u2010year\u2010old woman who suffered from recurrent thrombosis during pregnancy and the postpartum period. Among her family members, only her father had recurrent episodes of deep vein thrombosis of the lower extremities, from his youth. The antithrombin and antifactor Xa heparin cofactor activities of the proposita's plasma were 61% and 42% of normal, respectively. The progressive antithrombin and antifactor Xa activities were also decreased to 55% and 58% of normal, respectively. The immunoreactive level of AT III was within the normal range (23.1 mg\/dl). Analysis of the proposita's plasma by crossed immunoelectrophoresis in the presence or absence of heparin and by affinity chromatography on heparin\u2010Sepharose revealed that the proposita's AT III had apparently normal affinity for heparin. Nucleotide sequencing of 7 exons of the proposita's AT III gene amplified by polymerase chain reaction (PCR) disclosed that the second base of codon 393 comprised both G and A, indicating Arg393\u2010His conversion. The base sequences of exons 1,2,3a, 3b, 4, and 5 were normal, excluding any other mutation. These findings indicated that the proposita's AT III was a variant of AT III at the thrombin binding site and that the proposita was a heterozygote for the abnormality. Heparin affinity of purified abnormal AT III from the proposita's plasma was demonstrated to be increased upon affinity chromatography using heparin\u2010Sepharose, suggesting that the mutation (Arg393\u2010His) per se could possibly increase the affinity of antithrombin III for heparin.<\/jats:p><jats:p>For this variant AT III (Arg393\u2010His), the name AT III Kumamoto II is proposed. \u00a91995 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ajh.2830480104","type":"journal-article","created":{"date-parts":[[2007,2,21]],"date-time":"2007-02-21T13:57:05Z","timestamp":1172066225000},"page":"12-18","source":"Crossref","is-referenced-by-count":5,"title":["Antithrombin III kumamoto II; A single mutation at Arg393\u2010his increased the affinity of antithrombin III for heparin"],"prefix":"10.1002","volume":"48","author":[{"given":"Kenji","family":"Okajima","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroki","family":"Abe","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masako","family":"Wagatsuma","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroaki","family":"Okabe","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kiyoshi","family":"Takatsuki","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,7,11]]},"reference":[{"key":"e_1_2_1_2_2","first-page":"19","volume-title":"The Physiological Inhibitors of Coagulation and Fibrinolysis","author":"Abilgaard UA","year":"1979"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9343(89)80523-6"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9258(19)43472-8"},{"key":"e_1_2_1_5_2","first-page":"2406","article-title":"The active site of antithrombin","volume":"257","author":"Bjork I","year":"1982","journal-title":"J Biol Chem"},{"key":"e_1_2_1_6_2","doi-asserted-by":"crossref","first-page":"11964","DOI":"10.1016\/S0021-9258(18)45303-3","article-title":"A heparin\u2010binding site in antithrombin III. 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