Incidental Mutation 'R3545:Hexa'
ID 268171
Institutional Source Beutler Lab
Gene Symbol Hexa
Ensembl Gene ENSMUSG00000025232
Gene Name hexosaminidase A
Synonyms Hex-1
Accession Numbers
Essential gene? Probably non essential (E-score: 0.225) question?
Stock # R3545 (G1)
Quality Score 211
Status Not validated
Chromosome 9
Chromosomal Location 59446966-59472392 bp(+) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to G at 59464581 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Asparagine to Serine at position 157 (N157S)
Ref Sequence ENSEMBL: ENSMUSP00000026262 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000026262]
AlphaFold P29416
Predicted Effect probably damaging
Transcript: ENSMUST00000026262
AA Change: N157S

PolyPhen 2 Score 0.987 (Sensitivity: 0.73; Specificity: 0.96)
SMART Domains Protein: ENSMUSP00000026262
Gene: ENSMUSG00000025232
AA Change: N157S

DomainStartEndE-ValueType
signal peptide 1 22 N/A INTRINSIC
Pfam:Glycohydro_20b2 23 145 3e-25 PFAM
Pfam:Glyco_hydro_20 167 487 1.6e-88 PFAM
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.5%
  • 10x: 97.1%
  • 20x: 94.7%
Validation Efficiency
MGI Phenotype FUNCTION: This gene encodes a member of the glycosyl hydrolase 20 family of proteins. The encoded preproprotein is proteolytically processed to generate the alpha subunit of the lysosomal enzyme beta-hexosaminidase. This enzyme, together with the cofactor GM2 activator protein, catalyzes the degradation of the ganglioside GM2, and other molecules containing terminal N-acetyl hexosamines. Mice lacking the encoded protein exhibit accumulation of gangliosides in the brain and membranous cytoplasmic bodies in neurons. Certain mutations in the human ortholog of this gene cause Tay-Sachs disease. [provided by RefSeq, Aug 2016]
PHENOTYPE: Homozygous mutants accumulate excess amounts of GM2 ganglioside that is stored in neurons as membranous cytoplasmic bodies typically seen in the neurons of Tay-Sachs disease patients. However, the mutant mice appear to be functionally normal. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 34 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Ankrd28 A G 14: 31,437,217 (GRCm39) L646S probably benign Het
Clip1 A G 5: 123,769,141 (GRCm39) L532P probably damaging Het
Efl1 A T 7: 82,412,018 (GRCm39) E802D probably benign Het
F11r T C 1: 171,288,829 (GRCm39) V149A probably damaging Het
Fhit T C 14: 9,870,095 (GRCm38) T125A probably benign Het
Fmn2 A G 1: 174,330,192 (GRCm39) D194G unknown Het
Gdi1 T A X: 73,351,414 (GRCm39) F175L possibly damaging Het
Herc3 T C 6: 58,833,670 (GRCm39) S186P probably damaging Het
Kdm1b C T 13: 47,216,553 (GRCm39) R308W probably damaging Het
Lig1 T A 7: 13,026,089 (GRCm39) N281K possibly damaging Het
Lrp1b A T 2: 40,490,300 (GRCm39) L287H probably damaging Het
Mcf2 T C X: 59,180,806 (GRCm39) K74R probably damaging Het
Nat1 A G 8: 67,943,684 (GRCm39) D23G possibly damaging Het
Nbeal1 T C 1: 60,317,939 (GRCm39) F1959L probably damaging Het
Ncf1 T A 5: 134,255,463 (GRCm39) K143* probably null Het
Nid2 T A 14: 19,813,779 (GRCm39) Y195N probably damaging Het
Nlrp9a T C 7: 26,256,757 (GRCm39) I125T probably benign Het
Nme7 T C 1: 164,213,351 (GRCm39) F343S probably damaging Het
Otud4 A G 8: 80,391,684 (GRCm39) E443G probably damaging Het
Palld G T 8: 62,003,112 (GRCm39) A329E possibly damaging Het
Pask A T 1: 93,244,837 (GRCm39) V1095D probably damaging Het
Pdzd2 C T 15: 12,375,557 (GRCm39) R1526Q probably benign Het
Prkcq A G 2: 11,288,627 (GRCm39) K527E probably benign Het
Ramac T A 7: 81,418,270 (GRCm39) probably null Het
Reln A G 5: 22,432,598 (GRCm39) V134A possibly damaging Het
Rufy4 T C 1: 74,186,822 (GRCm39) C537R probably damaging Het
Septin9 T C 11: 117,243,499 (GRCm39) I350T probably damaging Het
Slc16a7 T A 10: 125,130,569 (GRCm39) K39* probably null Het
Spata32 T C 11: 103,101,570 (GRCm39) E21G possibly damaging Het
Tbc1d1 G A 5: 64,443,350 (GRCm39) R523Q probably damaging Het
Thnsl1 T G 2: 21,217,438 (GRCm39) D397E probably benign Het
Tubal3 T G 13: 3,983,560 (GRCm39) *447G probably null Het
Uprt T A X: 103,526,934 (GRCm39) L123H probably damaging Het
Usp9x T C X: 12,994,629 (GRCm39) L940P probably benign Het
Other mutations in Hexa
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL01877:Hexa APN 9 59,471,163 (GRCm39) splice site probably benign
IGL02078:Hexa APN 9 59,464,586 (GRCm39) missense probably benign 0.36
R0098:Hexa UTSW 9 59,465,383 (GRCm39) missense probably damaging 1.00
R0098:Hexa UTSW 9 59,465,383 (GRCm39) missense probably damaging 1.00
R0281:Hexa UTSW 9 59,461,509 (GRCm39) critical splice donor site probably null
R0364:Hexa UTSW 9 59,471,218 (GRCm39) missense probably benign 0.00
R0481:Hexa UTSW 9 59,462,693 (GRCm39) splice site probably benign
R1888:Hexa UTSW 9 59,464,586 (GRCm39) missense probably benign 0.36
R1888:Hexa UTSW 9 59,464,586 (GRCm39) missense probably benign 0.36
R2264:Hexa UTSW 9 59,462,660 (GRCm39) missense probably damaging 0.99
R4609:Hexa UTSW 9 59,464,602 (GRCm39) missense probably benign 0.32
R5777:Hexa UTSW 9 59,468,243 (GRCm39) missense probably damaging 0.99
R6041:Hexa UTSW 9 59,470,519 (GRCm39) missense probably damaging 0.99
R6403:Hexa UTSW 9 59,464,644 (GRCm39) missense probably damaging 1.00
R6776:Hexa UTSW 9 59,465,355 (GRCm39) missense probably damaging 1.00
R6805:Hexa UTSW 9 59,471,220 (GRCm39) missense possibly damaging 0.55
R6912:Hexa UTSW 9 59,447,221 (GRCm39) missense probably damaging 1.00
R7285:Hexa UTSW 9 59,471,222 (GRCm39) missense probably benign 0.02
R7467:Hexa UTSW 9 59,464,683 (GRCm39) critical splice donor site probably null
R7556:Hexa UTSW 9 59,470,582 (GRCm39) missense probably damaging 1.00
R7574:Hexa UTSW 9 59,471,267 (GRCm39) missense probably benign 0.22
R7614:Hexa UTSW 9 59,469,230 (GRCm39) missense probably damaging 1.00
R8550:Hexa UTSW 9 59,468,182 (GRCm39) missense probably benign 0.01
R9418:Hexa UTSW 9 59,464,592 (GRCm39) missense probably benign 0.07
Predicted Primers PCR Primer
(F):5'- TTTGGCACGGGACAGTTATG -3'
(R):5'- CATCTACACTTTTCCCAGGGG -3'

Sequencing Primer
(F):5'- CACGGGACAGTTATGTGTAGTC -3'
(R):5'- TTTTCCCAGGGGCTCACAGAG -3'
Posted On 2015-02-19