| Modification Notes |
DDEFL1 (development and differentiation enhancing factor-like 1), also known as ACAP4, UPLC1, CENTB6 or ASAP3 (ArfGAP with SH3 domain, ankyrin repeat and PH domain 3), is a 903 amino acid cytoplasmic protein belonging to the subfamily of ADP-ribosylation factor (Arf) GTPase-activating proteins. DDEFL1 contains two ANK repeats, an Arf-GAP domain and a PH domain, and is expressed in lung, liver, blood leukocytes and primary hepatocarcinoma. The Arf-GAP domain of DDEFL1 catalyzes the hydrolysis of GTP bound to Arf proteins. DDEFL1 promotes cell differentiation and migration, and has been implicated in the pathogenesis of hepatocellular carcinoma. Existing as two isoforms produced by alternative splicing events, DDEFL1 is encoded by a gene located on human chromosome 1. Human chromosome 1 spans 260 million base pairs, contains over 3,000 genes and comprises nearly 8% of the human genome. |