Summary
Recently reported X-ray structures for large core fragments derived from human fibrinogen
and fibrin make it possible to correlate structural and functional anomalies of known
genetic variants. Here we examine a variety of amino acid replacements previously
reported for hereditary dysfibrinogenemias, most of which are associated with impaired
fibrin polymerization. For many of these we have modeled in the mutant amino acid
and considered the structural consequences. We have also examined the cases of a small
deletion and a large insertion, as well as the impact of substitutions in the GPRPam
ligand that was co-crystallized with fragment double-D.