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Identification of a new Leu354Pro mutation responsible for factor XIII deficiency

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Abstract: We report a new homozygous CTG→CCG (Leu→Pro) mutation at codon 354 in the factor XIIIA gene of a patient suffering from FXIII deficiency. Leu354 lies in a pocket within the core domain of the FXIIIA molecule, with its side chain pointing into the structure of the barrel 1 domain. Replacement of leucine with a proline residue gives rise to steric hindrance between the proline ring and the surrounding residues, and rearrangement of these residues would be necessary for proline to be accommodated at this position. Using PCR-RFLP, we have demonstrated the absence of this mutation from 220 normal alleles. Together, these data suggest that Leu354Pro is likely to be the disease-causing mutation in this factor XIII deficient family.
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Keywords: FXIII deficiency; FXIIIA structure; factor XIII; missense mutation; transglutaminase

Document Type: Research Article

Affiliations: 1: Molecular Medicine Unit, University of Leeds, Clinical Sciences Building, St James's University Hospital, Leeds, UK and 2: Department of Haematology, Birmingham Children's Hospital, Birmingham, UK

Publication date: February 1, 2001

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