Laboratory for Molecular Diagnostics
Center for Nephrology and Metabolic Disorders
The gene ITGB3 encodes a major component of the glycoprotein IIb-IIIa complex, which binds fibrinogen and controls platelet clutting. Mutations result in autosomal recessive Glanzmann thrombasthenia, and polymorphisms account for alloimmune thrombocytopenia of the newborn.
The gene spans about 60kb. Only one splice variant is known that consists of 15 exons all of them coding.
The originally published sequence differs from our currently used database in codon numbering. In the original publication, translation starts at codon -26. for this reason, published mutations might differ from currently used codone numbers.[Error: Macro 'ref' doesn't exist]
The platelet-specific alloantigen system Pl(A) is based on a missense mutation at codon position 59, which was originally described as L33P. This mutation is the one most frequently implicated in syndromes of immune-mediated platelet destruction, particularly neonatal alloimmune thrombocytopenia and posttransfusion purpura.[Error: Macro 'ref' doesn't exist]
| Clinic | Method | Carrier testing |
| Turnaround | 5 days | |
| Specimen type | genomic DNA |
| Clinic | Method | Massive parallel sequencing |
| Turnaround | 25 days | |
| Specimen type | genomic DNA |
| Clinic | Method | Genomic sequencing of the entire coding region |
| Turnaround | 25 days | |
| Specimen type | genomic DNA |
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