Incidental Mutation 'R4237:Hexb'
ID 321191
Institutional Source Beutler Lab
Gene Symbol Hexb
Ensembl Gene ENSMUSG00000021665
Gene Name hexosaminidase B
Synonyms
MMRRC Submission 041054-MU
Accession Numbers
Essential gene? Non essential (E-score: 0.000) question?
Stock # R4237 (G1)
Quality Score 218
Status Validated
Chromosome 13
Chromosomal Location 97312839-97334865 bp(-) (GRCm39)
Type of Mutation intron
DNA Base Change (assembly) T to C at 97313259 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change
Ref Sequence ENSEMBL: ENSMUSP00000125088 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000022169] [ENSMUST00000022170] [ENSMUST00000042084] [ENSMUST00000161639] [ENSMUST00000161825]
AlphaFold P20060
Predicted Effect probably benign
Transcript: ENSMUST00000022169
SMART Domains Protein: ENSMUSP00000022169
Gene: ENSMUSG00000021665

DomainStartEndE-ValueType
signal peptide 1 31 N/A INTRINSIC
Pfam:Glycohydro_20b2 35 157 7.1e-24 PFAM
Pfam:Glyco_hydro_20 179 496 1.2e-94 PFAM
Predicted Effect probably benign
Transcript: ENSMUST00000022170
SMART Domains Protein: ENSMUSP00000022170
Gene: ENSMUSG00000021666

DomainStartEndE-ValueType
Pfam:GTP_EFTU 66 349 9.9e-64 PFAM
Pfam:GTP_EFTU_D2 379 446 4.3e-8 PFAM
low complexity region 447 473 N/A INTRINSIC
Pfam:EFG_II 482 556 3.9e-29 PFAM
EFG_IV 558 677 2.94e-17 SMART
EFG_C 679 766 1.9e-20 SMART
Predicted Effect probably benign
Transcript: ENSMUST00000042084
SMART Domains Protein: ENSMUSP00000048373
Gene: ENSMUSG00000021666

DomainStartEndE-ValueType
Pfam:GTP_EFTU 68 324 4.6e-64 PFAM
Pfam:GTP_EFTU_D2 354 421 4.2e-8 PFAM
low complexity region 422 448 N/A INTRINSIC
Pfam:EFG_II 457 531 3.7e-29 PFAM
EFG_IV 533 652 2.94e-17 SMART
EFG_C 654 741 1.9e-20 SMART
Predicted Effect noncoding transcript
Transcript: ENSMUST00000159321
Predicted Effect noncoding transcript
Transcript: ENSMUST00000160989
Predicted Effect probably benign
Transcript: ENSMUST00000161639
SMART Domains Protein: ENSMUSP00000125656
Gene: ENSMUSG00000021666

DomainStartEndE-ValueType
Pfam:GTP_EFTU 68 351 1.2e-68 PFAM
low complexity region 449 475 N/A INTRINSIC
Pfam:EFG_II 484 558 4.5e-30 PFAM
EFG_IV 560 679 2.94e-17 SMART
EFG_C 681 768 1.9e-20 SMART
Predicted Effect probably benign
Transcript: ENSMUST00000161825
SMART Domains Protein: ENSMUSP00000125088
Gene: ENSMUSG00000021666

DomainStartEndE-ValueType
Pfam:GTP_EFTU 68 351 2.3e-64 PFAM
Pfam:GTP_EFTU_D2 381 448 1.1e-8 PFAM
low complexity region 449 475 N/A INTRINSIC
Pfam:EFG_II 484 558 7.1e-30 PFAM
EFG_IV 560 679 2.94e-17 SMART
EFG_C 681 738 3.46e-2 SMART
Predicted Effect noncoding transcript
Transcript: ENSMUST00000161843
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.7%
  • 10x: 97.3%
  • 20x: 95.4%
Validation Efficiency 100% (44/44)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] Hexosaminidase B is the beta subunit of the lysosomal enzyme beta-hexosaminidase that, together with the cofactor GM2 activator protein, catalyzes the degradation of the ganglioside GM2, and other molecules containing terminal N-acetyl hexosamines. Beta-hexosaminidase is composed of two subunits, alpha and beta, which are encoded by separate genes. Both beta-hexosaminidase alpha and beta subunits are members of family 20 of glycosyl hydrolases. Mutations in the alpha or beta subunit genes lead to an accumulation of GM2 ganglioside in neurons and neurodegenerative disorders termed the GM2 gangliosidoses. Beta subunit gene mutations lead to Sandhoff disease (GM2-gangliosidosis type II). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2014]
PHENOTYPE: Homozygous mutants exhibit spasticity, muscle weakness, rigidity, tremors, and ataxia beginning around 4 months of age and resulting in death about 6 weeks later. Mutants accumulate GM2 ganglioside and glycolipid GA2 in brain. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 38 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
4930563M21Rik T C 9: 55,888,126 (GRCm39) D397G probably benign Het
6820408C15Rik C T 2: 152,270,873 (GRCm39) T32I possibly damaging Het
Abca13 A G 11: 9,384,188 (GRCm39) K3880R probably benign Het
Ahnak C T 19: 8,979,147 (GRCm39) L144F probably benign Het
Antxr2 A T 5: 98,086,266 (GRCm39) I447N probably damaging Het
Cdc20 C T 4: 118,290,257 (GRCm39) R468Q probably damaging Het
Clip2 A G 5: 134,564,051 (GRCm39) probably benign Het
Cntnap2 A T 6: 46,507,324 (GRCm39) probably benign Het
Ddi1 A G 9: 6,265,799 (GRCm39) M190T probably benign Het
Dicer1 A G 12: 104,695,487 (GRCm39) V148A possibly damaging Het
Dpp8 A G 9: 64,962,205 (GRCm39) D415G probably benign Het
Galnt11 G A 5: 25,470,258 (GRCm39) R569Q probably benign Het
Gpr6 T C 10: 40,946,604 (GRCm39) N326S probably damaging Het
Ighv3-4 A T 12: 114,217,533 (GRCm39) D19E probably benign Het
L3mbtl3 G A 10: 26,216,846 (GRCm39) A181V unknown Het
Lrrc37a G A 11: 103,393,115 (GRCm39) T770I probably damaging Het
Or12e8 T C 2: 87,188,597 (GRCm39) S270P probably damaging Het
Or2d2 A G 7: 106,728,244 (GRCm39) S119P probably damaging Het
Or6a2 T C 7: 106,600,536 (GRCm39) N177S probably damaging Het
Or7g32 C T 9: 19,388,893 (GRCm39) V215I probably benign Het
Phactr1 T A 13: 43,248,363 (GRCm39) N437K possibly damaging Het
Ppp1r13b T C 12: 111,805,170 (GRCm39) T181A probably benign Het
Prc1 G A 7: 79,960,964 (GRCm39) probably benign Het
Proca1 A G 11: 78,095,752 (GRCm39) N128S probably benign Het
Psmd8 G A 7: 28,876,546 (GRCm39) P155L probably damaging Het
Rad54l A G 4: 115,956,646 (GRCm39) V500A probably damaging Het
Scamp3 G A 3: 89,089,234 (GRCm39) probably null Het
Serpinb10 C T 1: 107,466,179 (GRCm39) T55M probably benign Het
Sipa1l2 T C 8: 126,218,395 (GRCm39) E314G probably benign Het
Slc14a2 G A 18: 78,250,283 (GRCm39) R62C probably damaging Het
Tdrd9 C T 12: 112,034,059 (GRCm39) R1334* probably null Het
Trank1 A G 9: 111,196,103 (GRCm39) I1376V probably benign Het
Trim28 T A 7: 12,761,838 (GRCm39) H268Q possibly damaging Het
Vmn2r76 T A 7: 85,879,740 (GRCm39) I187L probably benign Het
Wdr95 A T 5: 149,486,802 (GRCm39) R160* probably null Het
Wnt5a T C 14: 28,244,823 (GRCm39) C357R probably damaging Het
Zfp157 A G 5: 138,445,803 (GRCm39) I53V probably damaging Het
Zfp184 G A 13: 22,142,948 (GRCm39) R218H probably damaging Het
Other mutations in Hexb
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00509:Hexb APN 13 97,318,437 (GRCm39) missense probably damaging 1.00
IGL02010:Hexb APN 13 97,313,353 (GRCm39) missense probably benign 0.01
IGL02126:Hexb APN 13 97,314,532 (GRCm39) missense possibly damaging 0.93
IGL02303:Hexb APN 13 97,313,401 (GRCm39) missense probably damaging 1.00
IGL02955:Hexb APN 13 97,317,584 (GRCm39) utr 3 prime probably benign
IGL02988:Hexb UTSW 13 97,334,729 (GRCm39) missense unknown
R0311:Hexb UTSW 13 97,320,327 (GRCm39) unclassified probably benign
R0470:Hexb UTSW 13 97,314,507 (GRCm39) missense probably damaging 0.97
R0520:Hexb UTSW 13 97,317,618 (GRCm39) missense probably benign 0.00
R0893:Hexb UTSW 13 97,322,135 (GRCm39) missense probably benign 0.02
R1869:Hexb UTSW 13 97,327,767 (GRCm39) missense probably benign
R2295:Hexb UTSW 13 97,322,120 (GRCm39) missense probably damaging 1.00
R2884:Hexb UTSW 13 97,320,208 (GRCm39) missense probably damaging 1.00
R4238:Hexb UTSW 13 97,313,259 (GRCm39) intron probably benign
R4239:Hexb UTSW 13 97,313,259 (GRCm39) intron probably benign
R4689:Hexb UTSW 13 97,317,600 (GRCm39) missense probably damaging 1.00
R5166:Hexb UTSW 13 97,318,512 (GRCm39) missense probably benign 0.13
R6665:Hexb UTSW 13 97,315,893 (GRCm39) missense probably benign 0.01
R7379:Hexb UTSW 13 97,317,672 (GRCm39) missense probably damaging 1.00
R7553:Hexb UTSW 13 97,334,681 (GRCm39) missense probably benign 0.01
R8307:Hexb UTSW 13 97,330,707 (GRCm39) missense probably benign 0.02
R8830:Hexb UTSW 13 97,330,762 (GRCm39) missense probably benign
R8980:Hexb UTSW 13 97,330,689 (GRCm39) missense probably damaging 0.99
R9144:Hexb UTSW 13 97,317,599 (GRCm39) missense probably damaging 1.00
R9155:Hexb UTSW 13 97,314,414 (GRCm39) missense probably damaging 1.00
R9186:Hexb UTSW 13 97,325,836 (GRCm39) missense probably damaging 1.00
R9393:Hexb UTSW 13 97,313,336 (GRCm39) nonsense probably null
R9546:Hexb UTSW 13 97,322,176 (GRCm39) missense probably damaging 1.00
Predicted Primers PCR Primer
(F):5'- TTGTGCAGCTATTCCACGGC -3'
(R):5'- TCTCCTTATGCAGTTGACTTAAGG -3'

Sequencing Primer
(F):5'- AGCTATTCCACGGCTGTAGACAG -3'
(R):5'- CTAGACTGCTTTGGAAACTGC -3'
Posted On 2015-06-12