Incidental Mutation 'R0052:St8sia2'
Institutional Source Beutler Lab
Gene Symbol St8sia2
Ensembl Gene ENSMUSG00000025789
Gene NameST8 alpha-N-acetyl-neuraminide alpha-2,8-sialyltransferase 2
SynonymsSiat8b, ST8SiaII
MMRRC Submission 038346-MU
Accession Numbers

Ncbi RefSeq: NM_009181.2; MGI:106020

Is this an essential gene? Possibly non essential (E-score: 0.289) question?
Stock #R0052 (G1)
Quality Score
Status Validated
Chromosomal Location73939119-74013690 bp(-) (GRCm38)
Type of Mutationnonsense
DNA Base Change (assembly) G to T at 73943290 bp
Amino Acid Change Tyrosine to Stop codon at position 339 (Y339*)
Ref Sequence ENSEMBL: ENSMUSP00000026896 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000026896]
Predicted Effect probably null
Transcript: ENSMUST00000026896
AA Change: Y339*
SMART Domains Protein: ENSMUSP00000026896
Gene: ENSMUSG00000025789
AA Change: Y339*

signal peptide 1 23 N/A INTRINSIC
low complexity region 25 39 N/A INTRINSIC
Pfam:Glyco_transf_29 109 369 2.7e-72 PFAM
Predicted Effect noncoding transcript
Transcript: ENSMUST00000205875
Meta Mutation Damage Score 0.62 question?
Coding Region Coverage
  • 1x: 85.5%
  • 3x: 78.2%
  • 10x: 46.7%
  • 20x: 12.5%
Validation Efficiency 90% (62/69)
MGI Phenotype Strain: 3051219
FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] The protein encoded by this gene is a type II membrane protein that is thought to catalyze the transfer of sialic acid from CMP-sialic acid to N-linked oligosaccharides and glycoproteins. The encoded protein may be found in the Golgi apparatus and may be involved in the production of polysialic acid, a modulator of the adhesive properties of neural cell adhesion molecule (NCAM1). This protein is a member of glycosyltransferase family 29. [provided by RefSeq, Jul 2008]
PHENOTYPE: Homozygous null mice display abnormal mossy fiber morphology, increased exploration in new environment and impaired fear responses. [provided by MGI curators]
Allele List at MGI

All alleles(1) : Targeted(1)

Other mutations in this stock
Total: 32 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Apba1 T C 19: 23,915,951 S438P possibly damaging Het
Atp2a1 A G 7: 126,457,897 probably benign Het
Bicd2 T A 13: 49,375,314 L184Q probably damaging Het
Bub1 G A 2: 127,809,039 T618I probably benign Het
Dsp A G 13: 38,197,364 D2096G possibly damaging Het
Eno4 A G 19: 58,968,553 D357G probably damaging Het
Fam214a A G 9: 75,018,983 probably benign Het
Fcrls A T 3: 87,256,778 I348N possibly damaging Het
Fgl2 A T 5: 21,375,349 S230C probably damaging Het
Ginm1 T A 10: 7,779,306 E57D possibly damaging Het
Itga9 T A 9: 118,636,549 I157N probably damaging Het
Kif21a T C 15: 90,970,857 E700G probably damaging Het
Mmd C T 11: 90,259,998 probably benign Het
Morn3 T C 5: 123,046,663 Y38C probably damaging Het
Prex2 T A 1: 11,160,156 L802Q probably damaging Het
Psd3 A G 8: 67,882,979 probably null Het
Ralgds T A 2: 28,544,388 probably null Het
Rmdn2 A G 17: 79,650,331 E16G probably damaging Het
Slc17a3 C T 13: 23,855,858 S293F probably damaging Het
Slc4a4 A C 5: 89,156,336 H502P possibly damaging Het
Slco3a1 A T 7: 74,504,326 I166N probably benign Het
Snx5 A T 2: 144,259,192 probably null Het
Srgap1 T C 10: 121,800,827 D741G possibly damaging Het
Tdo2 T A 3: 81,967,025 N210I probably benign Het
Thada A T 17: 84,455,158 N104K probably damaging Het
Timm8b A T 9: 50,605,030 D61V possibly damaging Het
Trbv12-1 T C 6: 41,113,916 F74S possibly damaging Het
Tshz1 G A 18: 84,014,945 T446I possibly damaging Het
Ubap2l T C 3: 90,038,928 N123S possibly damaging Het
Usp12 A G 5: 146,739,104 V336A possibly damaging Het
Xrn2 T A 2: 147,040,965 probably benign Het
Zfp14 G T 7: 30,038,328 Q411K probably damaging Het
Other mutations in St8sia2
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL02161:St8sia2 APN 7 73976682 missense probably benign 0.00
IGL02261:St8sia2 APN 7 73966846 missense probably damaging 1.00
IGL02941:St8sia2 APN 7 73976649 intron probably benign
IGL02971:St8sia2 APN 7 73966811 missense probably damaging 1.00
IGL03147:St8sia2 UTSW 7 73966819 missense probably damaging 1.00
R0052:St8sia2 UTSW 7 73943290 nonsense probably null
R0052:St8sia2 UTSW 7 73971952 missense probably damaging 1.00
R0733:St8sia2 UTSW 7 73960840 missense probably benign
R1202:St8sia2 UTSW 7 73972035 missense probably benign 0.43
R1419:St8sia2 UTSW 7 73966994 nonsense probably null
R1962:St8sia2 UTSW 7 73943309 missense probably damaging 1.00
R2051:St8sia2 UTSW 7 73943202 missense possibly damaging 0.91
R4106:St8sia2 UTSW 7 73960761 missense probably damaging 1.00
R4989:St8sia2 UTSW 7 73966961 missense possibly damaging 0.75
R5541:St8sia2 UTSW 7 73966900 missense probably benign 0.00
R5859:St8sia2 UTSW 7 73966906 missense probably damaging 1.00
R6029:St8sia2 UTSW 7 73960710 missense possibly damaging 0.96
R6260:St8sia2 UTSW 7 73976693 missense possibly damaging 0.56
R6416:St8sia2 UTSW 7 73971921 missense probably damaging 1.00
Protein Function and Prediction

St8sia2 encodes STX/ST8Sia II, a sialyltransferase that can synthesize polysialic acid on α2,3-sialylated N-glycans of glycoproteins in neural cell types during development and in regions of neurogenesis and neuroplasticity in adults (1-4).


St8sia2tm1Jxm/tm1Jxm; MGI:3051219

involves: C57BL/6

Homozygous null mice display abnormal mossy fiber morphology, increased exploration in new environment and impaired fear responses (4).

Posted On2012-12-17
Science WriterAnne Murray