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FLASH GENE

Symbol

GBA

contributors: mct/npt/shn - updated : 23-10-2013

HGNC name	glucosidase, beta, acid
HGNC id	4177

FLASH GENE DNA RNA EXPRESSION PROTEIN DISORDER ANIMAL & CELL MODELS

PROTEIN

PHYSICAL PROPERTIES

STRUCTURE

motifs/domains

conjugated

GlycoP

HOMOLOGY

interspecies	ortholog to Gba, Mus musculus
	ortholog to Gba, Rattus norvegicus
	ortholog to gba, danio rerio

Homologene

FAMILY

glycosyl hydrolase 30 family

CATEGORY

enzyme

SUBCELLULAR LOCALIZATION	extracellular
	intracellular
	intracellular,cytoplasm,organelle,membrane
	intracellular,cytoplasm,organelle,endoplasmic reticulum
	intracellular,cytoplasm,organelle,Golgi
	intracellular,cytoplasm,organelle,endosome
	intracellular,cytoplasm,organelle,lysosome
text	lysosomal membrane protein

basic FUNCTION	glucosidase
	glucocerebrosidase
	penultimate intermediate in the degradative pathway of complex glycolipids
	hydrolyzing glucosylceramide
	GBA and GBA2 are not only glucosylceramide beta-glucosidases but both also bile acid beta-glucosidases
	novel function of GBA1 as a Cholesteryl glucoside-synthesizing enzyme

CELLULAR PROCESS

PHYSIOLOGICAL PROCESS

PATHWAY

metabolism

lipid/lipoprotein

signaling

sphingolipid metabolism

a component

INTERACTION

DNA

RNA

small molecule

protein	parkin and mutant glucocerebrosidas
	TCP1 ring complex, TRiC and c-Cbl
	Alpha-synuclein
	Hsp70 and Hsp90
	GBA, GBA2, both have glucosylceramide as a main natural substrate
	ITCH interacts with mutant GBA variants and mediates their lysine 48 polyubiquitination and degradation
	SNCA interacts with GBA and efficiently inhibits enzyme activity
	PSAP a protein vital for GBA activity, protects GBA against SNCA inhibition
	lysosomal activity of GBA is tightly linked to expression of its trafficking receptor, SCARB2
	lipids regulate the hydrolysis of membrane bound glucosylceramide by GBA

cell & other

REGULATION

Other

targeted to the lysosome by M6P receptor mediated pathway

ASSOCIATED DISORDERS

corresponding disease(s)

GBA1 , GBA2 , GBA3 , PARK24

related resource

Gaucher Disease at GeneDis

Other morbid association(s)

Type Gene Modification Chromosome rearrangement Protein expression Protein Function constitutional germinal mutation       GBA mutations may be associated with pathologically "purer" Lewy Body disorders, characterized by more extensive (cortical) LB, and less severe AD pathological findings and may be a useful marker for LB disorders constitutional       loss of function loss of GBA activity is sufficient to cause lysosomal dysfunction and accumulation of alpha-synuclein aggregates constitutional     --low   in sporadic Parkinson disease are related to the abnormal accumulation of SNCA and are associated with substantial alterations in lysosomal chaperone-mediated autophagy pathways and lipid metabolism

Susceptibility

to Parkinson disease

Variant & Polymorphism other	strong association between GBA mutations and Parkinson disease (Sidransky 2009)

Candidate gene	GBA mutations may be associated with pathologically "purer" Lewy body (LB) disorders, characterized by more extensive (cortical) LB, and less severe Alzheimer disease pathological findings and may be a useful marker for LB disorders (Clark 2009)
Marker
Therapy target	potent therapeutic potential of HDAC inhibitors as SAHA and LB-205 molecules for the treatment of Gaucher disease

ANIMAL & CELL MODELS

	a natural canine model of Gaucher disease mice homozygous for the RecNciI mutation had little GC enzyme activity and accumulated glucosylceramide in brain and liver, mice homozygous for the L444P mutation had higher levels of GC activity and no detectable accumulation of glucosylceramide in brain and liver, both point mutation mice died within 48 hr of birth
	mouse with strong reduction in GCase activity in all tissues except the skin exhibit rapid motor dysfunction associated with severe neurodegeneration and apoptotic cell death within the brain