Amidohydrolase that hydrolyzes specifically one of the carboamide linkages in D-pantetheine thus recycling pantothenic acid (vitamin B5) and releasing cysteamine (PubMed:11491533). Involved in the thymus homing of bone marrow cells. May regulate beta-2 integrin- mediated cell adhesion, migration and motility of neutrophil. . This is the function of VNN2 (vanin 2, Ensembl gene identifier ENSG00000112303).