ART4

Ecto-ADP-ribosyltransferase 4 is an is_associated_with::enzyme that in humans is encoded by the ART4 is_associated_with::gene. ART4 has also been designated as CD297 (is_associated_with::cluster of differentiation 297).

Function
This gene encodes a protein that contains a mono-ADP-ribosylation (ART) motif. It is a member of the ADP-ribosyltransferase gene family but enzymatic activity has not been demonstrated experimentally. Antigens of the Dombrock blood group system are located on the gene product, which is glycosylphosphatidylinositol-anchored to the erythrocyte membrane. Allelic variants, some of which lead to adverse transfusion reactions, are known.

Blood group antigens
Several antigens have been recognised in this family. These are DO*A, DO*JO1, DO*A-WL, DO*DOYA, DO*B, DO*B-WL, DO*B-SH-Q149K, DO*B-(WL)-I175N, DO*HY1, DO*HY2 and DO*DOMR.

Model organisms
is_associated_with::Model organisms have been used in the study of ART4 function. A conditional is_associated_with::knockout mouse line called Art4tm1a(KOMP)Wtsi was generated at the is_associated_with::Wellcome Trust Sanger Institute. Male and female animals underwent a standardized is_associated_with::phenotypic screen to determine the effects of deletion. Additional screens performed: - In-depth immunological phenotyping - in-depth bone and cartilage phenotyping

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