Positional cloning of a gene for Hermansky-Pudlak syndrome, a disorder of cytoplasmic organelles.
Hermansky-Pudlak syndrome (HPS) is an often-fatal autosomal recessive disease in which albinism, bleeding, and lysosomal storage result from defects of diverse cytoplasmic organelles: melanosomes, platelet dense bodies, and lysosomes. HPS is the most common single-gene disorder in Puerto Rico, with an incidence of 1 in 1,800. We have identified the HPS gene by positional cloning, and found homozygous frameshifts in this gene in Puerto Rican, Swiss, Irish and Japanese HPS patients. The HPS polypeptide is a novel transmembrane protein that is likely to be a component of multiple cytoplasmic organelles and that is apparently crucial for their normal development and function. The different clinical phenotypes associated with the different HPS frameshifts we observed suggests that differentially truncated HPS polypeptides may have somewhat different consequences for subcellular function.
Oh
J
J
Department of Medical Genetics, University of Wisconsin, Madison 53706, USA.
Bailin
T
T
Fukai
K
K
Feng
G H
GH
Ho
L
L
Mao
J I
JI
Frenk
E
E
Tamura
N
N
Spritz
R A
RA
D016115:Albinism, Oculocutaneous / Q000150:complications / Q000453:epidemiology / Q000235:genetics*; D000595:Amino Acid Sequence; D001483:Base Sequence; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D003593:Cytoplasm / Q000235:genetics* / Q000473:pathology; D005786:Gene Expression Regulation; D005819:Genetic Markers; D006801:Humans; D007494:Ireland; D007564:Japan; D016464:Lysosomal Storage Diseases / Q000150:complications / Q000453:epidemiology / Q000235:genetics*; D008565:Membrane Proteins / Q000235:genetics*; D008969:Molecular Sequence Data; D009154:Mutation; D010641:Phenotype; D011647:Puerto Rico; D013557:Switzerland; D013577:Syndrome
D005819:Genetic Markers; C102160:HPS1 protein, human; D008565:Membrane Proteins