Hermansky-Pudlak syndrome type 2 (HPS2) is an extremely rare autosomal recessive inherited disease characterized by partial oculocutaneous albinism (OCA), bleeding diathesis due to a storage pool deficiency and immunodeficiency.
Mutations in RAB27A, LYST, and AP3B1 give rise to FHL associated with oculocutaneous albinism, and patients with FHL are usually only screened for mutations in these genes when albinism is observed.
Our results suggest that SLC24A5 is a previously unreported nonsyndromic OCA candidate gene and that the SLC24A5 transporter is transported into mature melanosomes by HPS protein complexes.
Patients with Hermansky-Pudlak syndrome type 2 (HPS2) present with oculocutaneous albinism, nystagmus, prolonged bleeding time, and increased susceptibility to infections.
We now report 2 unrelated subjects with HPS2 who show a characteristic clinical phenotype of oculocutaneous albinism, platelet and T-lymphocyte dysfunction and neutropenia.
This HPS database (HPSD; http://liweilab.genetics.ac.cn/HPSD/) provides integrated, annotatory, and curative data that is distributed in a variety of public databases or predicted by bioinformatics servers for the recently cloned human and mouse HPS genes, as well as for the genes responsible for HPSrelated syndromes, such as ChediakHigashi Syndrome (CHS), Griscelli syndrome (GS), oculocutaneous albinism (OCA), Usher syndrome type 1B (USH1B), and ocular albinism (OA).