Incidental Mutation 'A4554:Lmtk2'
ID97
Institutional Source Beutler Lab
Gene Symbol Lmtk2
Ensembl Gene ENSMUSG00000038970
Gene Namelemur tyrosine kinase 2
SynonymsAATYK2, A330101P12Rik, KPI2, cprk, KPI-2, 2900041G10Rik, BREK
Accession Numbers

Genbank: NM_001081109; MGI: 3036247

Is this an essential gene? Possibly non essential (E-score: 0.345) question?
Stock #A4554 of strain gemini
Quality Score
Status Validated
Chromosome5
Chromosomal Location144100436-144188204 bp(+) (GRCm38)
Type of Mutationmissense
DNA Base Change (assembly) A to G at 144166317 bp
ZygosityHomozygous
Amino Acid Change Aspartic acid to Glycine at position 298 (D298G)
Ref Sequence ENSEMBL: ENSMUSP00000048238 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000041804]
Predicted Effect possibly damaging
Transcript: ENSMUST00000041804
AA Change: D298G

PolyPhen 2 Score 0.820 (Sensitivity: 0.84; Specificity: 0.93)
SMART Domains Protein: ENSMUSP00000048238
Gene: ENSMUSG00000038970
AA Change: D298G

DomainStartEndE-ValueType
signal peptide 1 26 N/A INTRINSIC
transmembrane domain 42 61 N/A INTRINSIC
low complexity region 72 88 N/A INTRINSIC
STYKc 136 406 3.4e-39 SMART
low complexity region 924 953 N/A INTRINSIC
low complexity region 1019 1035 N/A INTRINSIC
low complexity region 1104 1117 N/A INTRINSIC
low complexity region 1168 1180 N/A INTRINSIC
low complexity region 1252 1266 N/A INTRINSIC
low complexity region 1354 1367 N/A INTRINSIC
low complexity region 1380 1392 N/A INTRINSIC
Meta Mutation Damage Score 0.0608 question?
Coding Region Coverage
  • 1x: 85.5%
  • 3x: 63.0%
Validation Efficiency 84% (92/109)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] The protein encoded by this gene belongs to the protein kinase superfamily and the protein tyrosine kinase family. It contains N-terminal transmembrane helices and a long C-terminal cytoplasmic tail with serine/threonine/tyrosine kinase activity. This protein interacts with several other proteins, such as Inhibitor-2 (Inh2), protein phosphatase-1 (PP1C), p35, and myosin VI. It phosporylates other proteins, and is itself also phosporylated when interacting with cyclin-dependent kinase 5 (cdk5)/p35 complex. This protein involves in nerve growth factor (NGF)-TrkA signalling, and also plays a critical role in endosomal membrane trafficking. Mouse studies suggested an essential role of this protein in spermatogenesis. [provided by RefSeq, Oct 2009]
PHENOTYPE: Mice homozygous for a null mutation in this gene display partial prenatal lethality, male infertility, and azoospermia. [provided by MGI curators]
Allele List at MGI

All alleles(31) : Targeted, knock-out(1) Gene trapped(30)

Other mutations in this stock
Total: 18 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Asap1 T C 15: 64,124,711 probably benign Het
Bpifb5 A T 2: 154,227,180 Y139F possibly damaging Homo
Chd2 A C 7: 73,480,968 V782G probably benign Homo
Chst4 G T 8: 110,029,888 Q448K probably benign Homo
Dido1 T C 2: 180,675,371 K8E probably damaging Homo
Evpl A G 11: 116,220,834 L2010P probably damaging Homo
Fgl2 A G 5: 21,372,778 E21G probably benign Homo
Greb1l A T 18: 10,532,862 M919L possibly damaging Homo
Kel T A 6: 41,697,419 D359V possibly damaging Homo
Masp1 A T 16: 23,454,940 probably null Homo
Mrgprb8 A T 7: 48,389,408 I276F probably damaging Homo
Nde1 T C 16: 14,188,410 probably benign Homo
Rbck1 G T 2: 152,319,172 N385K probably damaging Homo
Senp6 G T 9: 80,148,458 probably benign Het
Tm4sf4 T A 3: 57,437,767 probably null Homo
Ubn2 A T 6: 38,484,110 H488L probably damaging Homo
Vmn2r120 A G 17: 57,525,715 F155L probably benign Homo
Vmn2r65 T A 7: 84,946,583 T298S probably damaging Homo
Other mutations in Lmtk2
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00427:Lmtk2 APN 5 144134155 missense probably damaging 1.00
IGL00496:Lmtk2 APN 5 144174694 missense probably benign
IGL00848:Lmtk2 APN 5 144176398 missense probably benign
IGL01450:Lmtk2 APN 5 144174702 missense probably benign 0.03
IGL01833:Lmtk2 APN 5 144175935 nonsense probably null
IGL01967:Lmtk2 APN 5 144182779 missense probably benign
IGL01998:Lmtk2 APN 5 144176065 missense probably damaging 1.00
IGL02106:Lmtk2 APN 5 144175951 missense probably benign 0.03
IGL02147:Lmtk2 APN 5 144156936 missense possibly damaging 0.78
IGL02581:Lmtk2 APN 5 144148348 missense probably damaging 1.00
madagascar UTSW 5 144174919 missense probably benign 0.02
R0039:Lmtk2 UTSW 5 144166387 missense probably damaging 1.00
R0039:Lmtk2 UTSW 5 144166387 missense probably damaging 1.00
R0108:Lmtk2 UTSW 5 144174285 missense possibly damaging 0.78
R0367:Lmtk2 UTSW 5 144174285 missense possibly damaging 0.78
R0515:Lmtk2 UTSW 5 144174991 missense possibly damaging 0.77
R1434:Lmtk2 UTSW 5 144174589 missense probably damaging 1.00
R1617:Lmtk2 UTSW 5 144173862 missense probably damaging 1.00
R1760:Lmtk2 UTSW 5 144174175 missense probably damaging 0.99
R1785:Lmtk2 UTSW 5 144174988 missense possibly damaging 0.61
R1786:Lmtk2 UTSW 5 144174988 missense possibly damaging 0.61
R1907:Lmtk2 UTSW 5 144175110 missense probably benign 0.00
R2130:Lmtk2 UTSW 5 144174988 missense possibly damaging 0.61
R2131:Lmtk2 UTSW 5 144174988 missense possibly damaging 0.61
R2132:Lmtk2 UTSW 5 144174988 missense possibly damaging 0.61
R2133:Lmtk2 UTSW 5 144174988 missense possibly damaging 0.61
R2140:Lmtk2 UTSW 5 144147615 missense probably damaging 1.00
R2141:Lmtk2 UTSW 5 144147615 missense probably damaging 1.00
R2210:Lmtk2 UTSW 5 144147609 missense probably damaging 1.00
R2289:Lmtk2 UTSW 5 144176106 missense possibly damaging 0.80
R2312:Lmtk2 UTSW 5 144173626 missense probably damaging 1.00
R2352:Lmtk2 UTSW 5 144173911 missense probably benign 0.05
R3870:Lmtk2 UTSW 5 144166427 splice site probably benign
R4011:Lmtk2 UTSW 5 144175879 missense probably benign 0.01
R4272:Lmtk2 UTSW 5 144183226 missense probably benign 0.05
R4361:Lmtk2 UTSW 5 144147664 missense probably damaging 1.00
R4580:Lmtk2 UTSW 5 144174781 missense possibly damaging 0.56
R4621:Lmtk2 UTSW 5 144174934 missense probably benign 0.02
R4981:Lmtk2 UTSW 5 144176447 missense probably damaging 1.00
R5818:Lmtk2 UTSW 5 144156900 missense probably benign 0.07
R5984:Lmtk2 UTSW 5 144174838 missense probably benign
R6083:Lmtk2 UTSW 5 144182756 missense probably damaging 1.00
R6180:Lmtk2 UTSW 5 144175342 missense probably damaging 1.00
R6411:Lmtk2 UTSW 5 144174586 missense probably damaging 0.99
R6544:Lmtk2 UTSW 5 144173806 missense possibly damaging 0.68
R6628:Lmtk2 UTSW 5 144174685 missense probably benign 0.03
R6698:Lmtk2 UTSW 5 144174919 missense probably benign 0.02
R6742:Lmtk2 UTSW 5 144148357 missense probably damaging 1.00
R6763:Lmtk2 UTSW 5 144173797 missense probably damaging 1.00
R7286:Lmtk2 UTSW 5 144174360 nonsense probably null
R7390:Lmtk2 UTSW 5 144129443 missense possibly damaging 0.79
R7594:Lmtk2 UTSW 5 144173746 missense probably damaging 1.00
R7660:Lmtk2 UTSW 5 144148340 missense probably damaging 1.00
R7785:Lmtk2 UTSW 5 144174753 missense probably benign 0.00
X0024:Lmtk2 UTSW 5 144174250 missense probably benign 0.22
Z1088:Lmtk2 UTSW 5 144182851 missense probably benign 0.12
Nature of Mutation
DNA sequencing using the SOLiD technique identified an A to G transition at position 1131 of the Lmtk2 transcript in exon 9 of 14 total exons. The mutated nucleotide causes an aspartic acid to glycine substitution at amino acid 298 of the encoded protein. The mutation has been confirmed by DNA sequencing using the Sanger method (Figure 1).
Protein Function and Prediction
The Lmtk2 gene encodes a 1471 amino acid transmembrane serine/threonine protein kinase that is predominantly expressed in the brain. The kinase domain occurs at amino acids 136-406, with nucleotide binding at residues 142-150 and the proton acceptor site at residue 264. The transmembrane domain is located at amino acids 42-62 (Uniprot Q3TYD6). Mice homozygous for a null mutation in this gene display partial prenatal lethality, male infertility, and azoospermia.
 
The D298G change occurs in the kinase domain, and is predicted to be possibly damaging by the PolyPhen program.
Posted On2010-03-16