Incidental Mutation 'R5166:Hexb'
ID 397323
Institutional Source Beutler Lab
Gene Symbol Hexb
Ensembl Gene ENSMUSG00000021665
Gene Name hexosaminidase B
Synonyms
Accession Numbers
Essential gene? Non essential (E-score: 0.000) question?
Stock # R5166 (G1)
Quality Score 225
Status Not validated
Chromosome 13
Chromosomal Location 97312839-97334865 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) T to C at 97318512 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Asparagine to Serine at position 283 (N283S)
Ref Sequence ENSEMBL: ENSMUSP00000022169 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000022169] [ENSMUST00000161825]
AlphaFold P20060
Predicted Effect probably benign
Transcript: ENSMUST00000022169
AA Change: N283S

PolyPhen 2 Score 0.127 (Sensitivity: 0.93; Specificity: 0.86)
SMART Domains Protein: ENSMUSP00000022169
Gene: ENSMUSG00000021665
AA Change: N283S

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 noncoding transcript
Transcript: ENSMUST00000159321
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: ENSMUST00000222700
Coding Region Coverage
  • 1x: 99.3%
  • 3x: 98.7%
  • 10x: 97.4%
  • 20x: 95.6%
Validation Efficiency
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: 52 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Acad12 T C 5: 121,738,083 (GRCm39) T435A probably benign Het
Adcy3 T A 12: 4,184,438 (GRCm39) I38N probably damaging Het
Aff1 A G 5: 103,902,523 (GRCm39) probably benign Het
Asxl1 A G 2: 153,243,041 (GRCm39) E1197G probably damaging Het
Brinp3 T A 1: 146,777,105 (GRCm39) N517K probably damaging Het
Carmil1 C T 13: 24,338,966 (GRCm39) probably null Het
Ccdc185 G A 1: 182,576,564 (GRCm39) Q42* probably null Het
Cdc23 C A 18: 34,784,742 (GRCm39) V7L unknown Het
Cdh10 A G 15: 19,013,446 (GRCm39) E682G probably damaging Het
Col6a3 C A 1: 90,738,330 (GRCm39) R456L probably damaging Het
Egf C T 3: 129,529,489 (GRCm39) R307H probably benign Het
Flt4 T C 11: 49,524,084 (GRCm39) probably null Het
Fstl5 A C 3: 76,536,267 (GRCm39) K26Q possibly damaging Het
Gk5 G T 9: 96,056,821 (GRCm39) A413S probably damaging Het
Glcci1 T A 6: 8,537,854 (GRCm39) S157R probably benign Het
Gzmc G A 14: 56,471,433 (GRCm39) A36V probably damaging Het
Hydin A G 8: 111,249,774 (GRCm39) E2239G possibly damaging Het
Igkv10-95 A T 6: 68,657,544 (GRCm39) Y20F probably benign Het
Il17re A G 6: 113,439,923 (GRCm39) T181A probably benign Het
Kcnh6 G A 11: 105,911,145 (GRCm39) A514T possibly damaging Het
Kcnk10 G A 12: 98,401,254 (GRCm39) R460W probably damaging Het
Krtap5-2 A T 7: 141,728,721 (GRCm39) S320T unknown Het
Larp1b G T 3: 40,918,487 (GRCm39) E24* probably null Het
Mettl22 A G 16: 8,296,115 (GRCm39) T135A probably benign Het
Mlh1 A G 9: 111,070,581 (GRCm39) V378A probably benign Het
Mmrn1 A T 6: 60,953,474 (GRCm39) H585L probably benign Het
Myh14 A G 7: 44,278,279 (GRCm39) F1024L probably damaging Het
Nbea A T 3: 55,926,874 (GRCm39) H776Q probably damaging Het
Nod2 A G 8: 89,390,875 (GRCm39) D372G possibly damaging Het
Nptn C T 9: 58,526,263 (GRCm39) R137* probably null Het
Or9k2 T C 10: 129,998,430 (GRCm39) Y255C possibly damaging Het
Pm20d2 C T 4: 33,181,803 (GRCm39) V267I probably benign Het
Rassf10 A G 7: 112,553,627 (GRCm39) D76G probably benign Het
Rbbp5 A G 1: 132,418,303 (GRCm39) T41A possibly damaging Het
Rttn T C 18: 89,031,218 (GRCm39) V643A possibly damaging Het
Sbno2 C A 10: 79,902,762 (GRCm39) E421* probably null Het
Slc17a3 T C 13: 24,026,525 (GRCm39) probably null Het
Slc1a6 T A 10: 78,632,103 (GRCm39) probably null Het
Slco2b1 A G 7: 99,338,220 (GRCm39) S106P possibly damaging Het
Spef1 T C 2: 131,016,511 (GRCm39) N28S probably damaging Het
Srebf2 C A 15: 82,069,603 (GRCm39) T675N probably damaging Het
Srp68 C A 11: 116,156,300 (GRCm39) E147D probably damaging Het
Tbcd T A 11: 121,500,216 (GRCm39) L1114H possibly damaging Het
Tex15 T C 8: 34,066,420 (GRCm39) V1950A probably benign Het
Tnfsf9 T A 17: 57,413,263 (GRCm39) F148Y possibly damaging Het
Traf6 A G 2: 101,520,402 (GRCm39) D150G probably benign Het
Ttn A G 2: 76,693,717 (GRCm39) Y262H possibly damaging Het
Unc93b1 A G 19: 3,994,027 (GRCm39) Y386C probably damaging Het
Vmn1r226 A T 17: 20,908,125 (GRCm39) E119V probably benign Het
Wrn A T 8: 33,842,100 (GRCm39) probably null Het
Zfp398 A G 6: 47,842,838 (GRCm39) I165V probably benign Het
Zfp850 A T 7: 27,689,781 (GRCm39) C142* probably null 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
R4237:Hexb UTSW 13 97,313,259 (GRCm39) intron probably benign
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
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'- AGTGTGCCCAGCTCTTCTAC -3'
(R):5'- CCAGCAATATAATGTCCAGATGTGC -3'

Sequencing Primer
(F):5'- GGTTTAGAGTTACCATACCAACATTG -3'
(R):5'- TGTAGACATAGTCCTTAAGGAGCCC -3'
Posted On 2016-07-06