Incidental Mutation 'R3122:Ext2'
ID 264089
Institutional Source Beutler Lab
Gene Symbol Ext2
Ensembl Gene ENSMUSG00000027198
Gene Name exostosin glycosyltransferase 2
Synonyms
MMRRC Submission 040595-MU
Accession Numbers
Essential gene? Essential (E-score: 1.000) question?
Stock # R3122 (G1)
Quality Score 225
Status Validated
Chromosome 2
Chromosomal Location 93525978-93652913 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to G at 93644170 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Leucine to Proline at position 37 (L37P)
Ref Sequence ENSEMBL: ENSMUSP00000122144 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000028623] [ENSMUST00000111248] [ENSMUST00000125407] [ENSMUST00000145838] [ENSMUST00000184931]
AlphaFold P70428
Predicted Effect probably damaging
Transcript: ENSMUST00000028623
AA Change: L37P

PolyPhen 2 Score 0.999 (Sensitivity: 0.14; Specificity: 0.99)
SMART Domains Protein: ENSMUSP00000028623
Gene: ENSMUSG00000027198
AA Change: L37P

DomainStartEndE-ValueType
transmembrane domain 24 46 N/A INTRINSIC
Pfam:Exostosin 100 380 2.4e-59 PFAM
Pfam:Glyco_transf_64 456 701 1.1e-99 PFAM
Predicted Effect probably damaging
Transcript: ENSMUST00000111248
AA Change: L37P

PolyPhen 2 Score 0.999 (Sensitivity: 0.14; Specificity: 0.99)
SMART Domains Protein: ENSMUSP00000106879
Gene: ENSMUSG00000027198
AA Change: L37P

DomainStartEndE-ValueType
transmembrane domain 24 46 N/A INTRINSIC
Predicted Effect noncoding transcript
Transcript: ENSMUST00000123649
Predicted Effect noncoding transcript
Transcript: ENSMUST00000125027
Predicted Effect probably damaging
Transcript: ENSMUST00000125407
AA Change: L37P

PolyPhen 2 Score 0.998 (Sensitivity: 0.27; Specificity: 0.99)
SMART Domains Protein: ENSMUSP00000120291
Gene: ENSMUSG00000027198
AA Change: L37P

DomainStartEndE-ValueType
transmembrane domain 24 46 N/A INTRINSIC
Pfam:Exostosin 100 380 8.8e-59 PFAM
Predicted Effect probably damaging
Transcript: ENSMUST00000145838
AA Change: L37P

PolyPhen 2 Score 0.999 (Sensitivity: 0.14; Specificity: 0.99)
SMART Domains Protein: ENSMUSP00000122144
Gene: ENSMUSG00000027198
AA Change: L37P

DomainStartEndE-ValueType
transmembrane domain 24 46 N/A INTRINSIC
Pfam:Exostosin 100 213 2.5e-17 PFAM
Predicted Effect noncoding transcript
Transcript: ENSMUST00000157046
Predicted Effect probably damaging
Transcript: ENSMUST00000184931
AA Change: L37P

PolyPhen 2 Score 0.998 (Sensitivity: 0.27; Specificity: 0.99)
SMART Domains Protein: ENSMUSP00000138956
Gene: ENSMUSG00000027198
AA Change: L37P

DomainStartEndE-ValueType
transmembrane domain 24 46 N/A INTRINSIC
Pfam:Exostosin 100 380 1.4e-57 PFAM
Pfam:Glyco_transf_64 456 559 9.5e-31 PFAM
Meta Mutation Damage Score 0.8588 question?
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.6%
  • 10x: 97.4%
  • 20x: 95.3%
Validation Efficiency 100% (48/48)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes one of two glycosyltransferases involved in the chain elongation step of heparan sulfate biosynthesis. Mutations in this gene cause the type II form of multiple exostoses. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Jul 2008]
PHENOTYPE: Homozygous null embryos lack heparan sulfate, initiate primitive streak formation but fail to form mesoderm, become growth arrested and die around gastrulation. Heterozygotes show various abnormalities in cartilage differentiation; about one-third form one or more exostoses on the ribs. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 46 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Adam18 T C 8: 25,118,248 (GRCm39) N8S possibly damaging Het
Ago3 A G 4: 126,311,165 (GRCm39) I16T probably benign Het
Alms1 C A 6: 85,644,945 (GRCm39) probably benign Het
Brdt A G 5: 107,525,011 (GRCm39) T851A probably damaging Het
Capn7 A T 14: 31,081,167 (GRCm39) I395F probably damaging Het
Ccbe1 A G 18: 66,199,900 (GRCm39) M274T probably benign Het
Ccdc146 T C 5: 21,499,591 (GRCm39) R864G possibly damaging Het
Ccdc17 G T 4: 116,456,749 (GRCm39) probably benign Het
Ccdc85a C A 11: 28,533,499 (GRCm39) C15F unknown Het
Cpt1c A G 7: 44,609,345 (GRCm39) Y715H probably damaging Het
Dmwd T A 7: 18,814,620 (GRCm39) F423L probably damaging Het
Dock3 C G 9: 106,788,542 (GRCm39) A1598P probably damaging Het
Fam120a T C 13: 49,045,562 (GRCm39) D758G possibly damaging Het
Foxn4 T C 5: 114,396,776 (GRCm39) T236A probably damaging Het
Gm9776 A T 13: 94,495,194 (GRCm39) probably benign Het
Grik1 A T 16: 87,803,361 (GRCm39) M277K probably damaging Het
H2-T23 T A 17: 36,341,855 (GRCm39) M248L probably benign Het
Hephl1 A G 9: 15,000,265 (GRCm39) F329S possibly damaging Het
Kif13a G A 13: 46,918,072 (GRCm39) probably benign Het
Knl1 T A 2: 118,899,425 (GRCm39) H375Q probably benign Het
Lox A G 18: 52,658,177 (GRCm39) F332S probably damaging Het
Ltf G A 9: 110,851,968 (GRCm39) C135Y probably damaging Het
Madd A G 2: 91,006,554 (GRCm39) Y347H probably damaging Het
Mboat1 T C 13: 30,422,031 (GRCm39) Y387H probably damaging Het
Mrc2 G A 11: 105,239,257 (GRCm39) probably null Het
Naip1 T C 13: 100,545,503 (GRCm39) T1342A probably damaging Het
Naip6 T C 13: 100,453,031 (GRCm39) D10G probably benign Het
Nudt8 A G 19: 4,052,015 (GRCm39) R209G possibly damaging Het
Or4c31 G T 2: 88,291,853 (GRCm39) M75I probably damaging Het
Or56a3 T C 7: 104,735,385 (GRCm39) V154A probably benign Het
Or8k35 A T 2: 86,424,954 (GRCm39) Y73N possibly damaging Het
Orc4 G A 2: 48,827,501 (GRCm39) P31S probably benign Het
Phactr1 T A 13: 43,213,049 (GRCm39) S131T possibly damaging Het
Phactr3 A G 2: 177,973,411 (GRCm39) I475V probably damaging Het
Pip T A 6: 41,828,819 (GRCm39) N121K probably damaging Het
Pla2g4d T C 2: 120,109,384 (GRCm39) R222G probably benign Het
Rbm42 A G 7: 30,349,152 (GRCm39) probably benign Het
Sowahb T C 5: 93,191,261 (GRCm39) D486G possibly damaging Het
Svep1 C T 4: 58,087,845 (GRCm39) V1745I possibly damaging Het
Tnfsf15 T A 4: 63,652,522 (GRCm39) E96D probably benign Het
Vmn1r217 A G 13: 23,298,249 (GRCm39) S218P probably damaging Het
Vmn2r129 G T 4: 156,686,692 (GRCm39) noncoding transcript Het
Vmn2r71 T G 7: 85,264,828 (GRCm39) Y53* probably null Het
Wapl A G 14: 34,451,172 (GRCm39) I729M possibly damaging Het
Wrnip1 A G 13: 32,986,744 (GRCm39) D175G probably benign Het
Zscan2 G A 7: 80,513,092 (GRCm39) A26T probably benign Het
Other mutations in Ext2
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL01132:Ext2 APN 2 93,621,418 (GRCm39) missense probably benign
IGL01554:Ext2 APN 2 93,642,294 (GRCm39) missense probably damaging 1.00
IGL01768:Ext2 APN 2 93,621,455 (GRCm39) splice site probably benign
IGL02160:Ext2 APN 2 93,643,929 (GRCm39) missense probably benign
IGL02677:Ext2 APN 2 93,537,590 (GRCm39) missense probably damaging 1.00
IGL02939:Ext2 APN 2 93,534,964 (GRCm39) splice site probably null
IGL03013:Ext2 APN 2 93,537,571 (GRCm39) intron probably benign
IGL03286:Ext2 APN 2 93,537,617 (GRCm39) missense probably damaging 1.00
R0018:Ext2 UTSW 2 93,626,037 (GRCm39) missense probably damaging 1.00
R0526:Ext2 UTSW 2 93,636,430 (GRCm39) missense probably damaging 0.99
R0580:Ext2 UTSW 2 93,626,070 (GRCm39) missense probably benign 0.31
R1383:Ext2 UTSW 2 93,636,458 (GRCm39) missense possibly damaging 0.92
R1538:Ext2 UTSW 2 93,537,632 (GRCm39) missense probably damaging 1.00
R1743:Ext2 UTSW 2 93,560,570 (GRCm39) missense probably damaging 1.00
R1792:Ext2 UTSW 2 93,534,890 (GRCm39) missense probably damaging 1.00
R2874:Ext2 UTSW 2 93,570,031 (GRCm39) missense possibly damaging 0.95
R4624:Ext2 UTSW 2 93,533,545 (GRCm39) missense probably benign 0.26
R4653:Ext2 UTSW 2 93,526,504 (GRCm39) missense probably benign 0.22
R4826:Ext2 UTSW 2 93,592,975 (GRCm39) missense probably benign 0.15
R4828:Ext2 UTSW 2 93,626,112 (GRCm39) missense probably benign 0.08
R4936:Ext2 UTSW 2 93,644,024 (GRCm39) nonsense probably null
R5311:Ext2 UTSW 2 93,526,606 (GRCm39) missense probably benign 0.04
R5799:Ext2 UTSW 2 93,642,317 (GRCm39) missense probably benign 0.01
R5850:Ext2 UTSW 2 93,644,004 (GRCm39) missense possibly damaging 0.94
R6230:Ext2 UTSW 2 93,592,965 (GRCm39) missense probably damaging 1.00
R6488:Ext2 UTSW 2 93,636,430 (GRCm39) missense probably damaging 0.99
R7047:Ext2 UTSW 2 93,570,002 (GRCm39) missense probably damaging 0.99
R7173:Ext2 UTSW 2 93,643,957 (GRCm39) missense probably damaging 1.00
R7391:Ext2 UTSW 2 93,560,612 (GRCm39) missense probably damaging 1.00
R7530:Ext2 UTSW 2 93,491,998 (GRCm39) missense probably benign 0.00
R7545:Ext2 UTSW 2 93,644,108 (GRCm39) missense probably benign
R7939:Ext2 UTSW 2 93,560,601 (GRCm39) missense probably damaging 1.00
R8160:Ext2 UTSW 2 93,644,107 (GRCm39) missense probably benign 0.05
R9072:Ext2 UTSW 2 93,644,144 (GRCm39) missense probably benign 0.28
R9245:Ext2 UTSW 2 93,534,836 (GRCm39) missense probably benign 0.23
R9338:Ext2 UTSW 2 93,526,603 (GRCm39) missense probably damaging 1.00
R9430:Ext2 UTSW 2 93,592,999 (GRCm39) missense possibly damaging 0.84
R9487:Ext2 UTSW 2 93,592,956 (GRCm39) missense probably damaging 1.00
Z1177:Ext2 UTSW 2 93,533,620 (GRCm39) critical splice acceptor site probably benign
Predicted Primers PCR Primer
(F):5'- TCTTTGGGTTGAAGCCGCAG -3'
(R):5'- AATCCAATCCACGCAGGGTATTG -3'

Sequencing Primer
(F):5'- CGCAGCGGTAGACATCGAAAC -3'
(R):5'- CAATCCACGCAGGGTATTGATTGC -3'
Posted On 2015-02-05