Incidental Mutation 'R0009:Cntn2'
| ID |
8230 |
| Institutional Source |
Beutler Lab
|
| Gene Symbol |
Cntn2
|
| Ensembl Gene |
ENSMUSG00000053024 |
| Gene Name |
contactin 2 |
| Synonyms |
Tax, axonin, TAG1, TAG-1, D130012K04Rik |
| MMRRC Submission |
038304-MU
|
| Accession Numbers |
|
| Essential gene? |
Possibly non essential
(E-score: 0.291)
|
| Stock # |
R0009 (G1)
|
| Quality Score |
|
|
Status
|
Validated
|
| Chromosome |
1 |
| Chromosomal Location |
132437163-132470989 bp(-) (GRCm39) |
| Type of Mutation |
nonsense |
| DNA Base Change (assembly) |
G to A
at 132443918 bp (GRCm39)
|
| Zygosity |
Heterozygous |
| Amino Acid Change |
Glutamine to Stop codon
at position 457
(Q457*)
|
| Gene Model |
predicted gene model for transcript(s):
[ENSMUST00000086521]
|
| AlphaFold |
Q61330 |
| Predicted Effect |
probably null
Transcript: ENSMUST00000086521
AA Change: Q954*
|
| SMART Domains |
Protein: ENSMUSP00000083707
Gene: ENSMUSG00000053024
AA Change: Q954*
| Domain | Start | End | E-Value | Type |
|---|
|
signal peptide
|
1 |
28 |
N/A |
INTRINSIC |
|
IGc2
|
54 |
120 |
8.78e-9 |
SMART |
|
IG
|
142 |
232 |
3.89e-1 |
SMART |
|
IGc2
|
254 |
315 |
2.14e-21 |
SMART |
|
IGc2
|
341 |
404 |
4.59e-12 |
SMART |
|
IGc2
|
433 |
497 |
7.52e-8 |
SMART |
|
IGc2
|
523 |
596 |
2.72e-5 |
SMART |
|
FN3
|
610 |
696 |
2.72e-12 |
SMART |
|
FN3
|
713 |
799 |
1.02e-2 |
SMART |
|
FN3
|
815 |
899 |
5.27e-10 |
SMART |
|
FN3
|
915 |
995 |
8.91e1 |
SMART |
|
| Predicted Effect |
noncoding transcript
Transcript: ENSMUST00000186487
|
| Predicted Effect |
probably null
Transcript: ENSMUST00000188065
AA Change: Q457*
|
| Predicted Effect |
noncoding transcript
Transcript: ENSMUST00000188143
|
| Predicted Effect |
probably benign
Transcript: ENSMUST00000189528
|
| Predicted Effect |
noncoding transcript
Transcript: ENSMUST00000190601
|
| Meta Mutation Damage Score |
0.9754 |
| Coding Region Coverage |
- 1x: 79.7%
- 3x: 70.1%
- 10x: 44.5%
- 20x: 24.1%
|
| Validation Efficiency |
93% (78/84) |
| MGI Phenotype |
FUNCTION: This gene encodes a member of the contactin family of proteins, part of the immunoglobulin superfamily of cell adhesion molecules. The encoded glycosylphosphatidylinositol (GPI)-anchored neuronal membrane protein plays a role in the proliferation, migration, and axon guidance of neurons of the developing cerebellum. Mice lacking a functional copy of this gene exhibit epileptic seizures and elevated expression of A1 adenosine receptors. [provided by RefSeq, Sep 2016]
PHENOTYPE: Targeted mutation of this locus results in molecular abnormalities in the central nervous system. [provided by MGI curators]
|
| Allele List at MGI |
All alleles(5) : Targeted(5)
|
| Other mutations in this stock |
Total: 29 list
| Gene | Ref | Var | Chr/Loc | Mutation | Predicted Effect | Zygosity |
|---|
| A1bg |
T |
G |
15: 60,791,482 (GRCm39) |
|
probably benign |
Het |
| Afm |
C |
A |
5: 90,693,243 (GRCm39) |
|
probably benign |
Het |
| Aplnr |
T |
A |
2: 84,967,620 (GRCm39) |
|
probably null |
Het |
| Arih2 |
T |
A |
9: 108,488,926 (GRCm39) |
H264L |
probably damaging |
Het |
| Ccdc116 |
T |
C |
16: 16,961,903 (GRCm39) |
E15G |
probably damaging |
Het |
| Cfap53 |
A |
G |
18: 74,432,247 (GRCm39) |
H45R |
probably benign |
Het |
| Chd3 |
A |
G |
11: 69,240,732 (GRCm39) |
L1569P |
probably damaging |
Het |
| Coro1a |
A |
T |
7: 126,300,585 (GRCm39) |
|
probably benign |
Het |
| Cracr2b |
T |
A |
7: 141,043,672 (GRCm39) |
L91Q |
probably damaging |
Het |
| Ctdspl |
T |
C |
9: 118,849,114 (GRCm39) |
|
probably null |
Het |
| Dnase1 |
T |
C |
16: 3,856,810 (GRCm39) |
V147A |
probably damaging |
Het |
| Glud1 |
G |
A |
14: 34,056,225 (GRCm39) |
G300S |
probably benign |
Het |
| Gm4847 |
C |
T |
1: 166,458,055 (GRCm39) |
V433I |
probably benign |
Het |
| Herc2 |
T |
C |
7: 55,857,560 (GRCm39) |
S4048P |
probably benign |
Het |
| Hp1bp3 |
T |
A |
4: 137,948,994 (GRCm39) |
I19K |
probably benign |
Het |
| Il1a |
C |
T |
2: 129,150,994 (GRCm39) |
D10N |
probably damaging |
Het |
| Il22ra2 |
A |
T |
10: 19,500,206 (GRCm39) |
N39I |
probably damaging |
Het |
| Magi2 |
A |
T |
5: 20,816,053 (GRCm39) |
Y747F |
probably benign |
Het |
| Mcc |
C |
T |
18: 44,579,000 (GRCm39) |
E803K |
probably damaging |
Het |
| Rims2 |
T |
A |
15: 39,398,362 (GRCm39) |
M1087K |
probably damaging |
Het |
| Riox2 |
C |
A |
16: 59,309,730 (GRCm39) |
D361E |
probably benign |
Het |
| Slc35e1 |
A |
T |
8: 73,238,553 (GRCm39) |
N318K |
probably damaging |
Het |
| Slc9a2 |
A |
T |
1: 40,802,762 (GRCm39) |
E604V |
probably benign |
Het |
| Tbx19 |
A |
T |
1: 164,988,089 (GRCm39) |
S15T |
possibly damaging |
Het |
| Tm4sf5 |
C |
T |
11: 70,401,538 (GRCm39) |
A179V |
probably damaging |
Het |
| Trappc11 |
A |
T |
8: 47,956,355 (GRCm39) |
C874S |
possibly damaging |
Het |
| Trpm3 |
T |
A |
19: 22,891,810 (GRCm39) |
Y885N |
probably damaging |
Het |
| Unc5a |
T |
A |
13: 55,150,692 (GRCm39) |
C505S |
probably damaging |
Het |
| Xpo5 |
T |
C |
17: 46,515,712 (GRCm39) |
|
probably benign |
Het |
|
| Other mutations in Cntn2 |
| Allele | Source | Chr | Coord | Type | Predicted Effect | PPH Score |
|---|
|
IGL01106:Cntn2
|
APN |
1 |
132,449,622 (GRCm39) |
splice site |
probably benign |
|
|
IGL01137:Cntn2
|
APN |
1 |
132,449,035 (GRCm39) |
splice site |
probably benign |
|
|
IGL01339:Cntn2
|
APN |
1 |
132,446,643 (GRCm39) |
splice site |
probably null |
|
|
IGL01369:Cntn2
|
APN |
1 |
132,443,843 (GRCm39) |
missense |
probably benign |
|
|
IGL01572:Cntn2
|
APN |
1 |
132,455,909 (GRCm39) |
missense |
probably damaging |
1.00 |
|
IGL02389:Cntn2
|
APN |
1 |
132,453,059 (GRCm39) |
missense |
probably damaging |
0.99 |
|
IGL02473:Cntn2
|
APN |
1 |
132,446,069 (GRCm39) |
missense |
probably benign |
|
|
IGL02550:Cntn2
|
APN |
1 |
132,456,801 (GRCm39) |
missense |
probably null |
0.03 |
|
IGL02608:Cntn2
|
APN |
1 |
132,453,654 (GRCm39) |
missense |
possibly damaging |
0.87 |
|
IGL02755:Cntn2
|
APN |
1 |
132,457,040 (GRCm39) |
missense |
probably benign |
0.43 |
|
IGL02850:Cntn2
|
APN |
1 |
132,446,114 (GRCm39) |
missense |
probably benign |
0.00 |
|
IGL02887:Cntn2
|
APN |
1 |
132,444,308 (GRCm39) |
missense |
probably damaging |
0.96 |
|
IGL03060:Cntn2
|
APN |
1 |
132,456,678 (GRCm39) |
missense |
probably benign |
0.03 |
|
IGL03224:Cntn2
|
APN |
1 |
132,450,780 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R0009:Cntn2
|
UTSW |
1 |
132,443,918 (GRCm39) |
nonsense |
probably null |
|
|
R0270:Cntn2
|
UTSW |
1 |
132,449,462 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R0739:Cntn2
|
UTSW |
1 |
132,456,750 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R0849:Cntn2
|
UTSW |
1 |
132,450,124 (GRCm39) |
missense |
probably benign |
0.09 |
|
R0903:Cntn2
|
UTSW |
1 |
132,461,422 (GRCm39) |
small deletion |
probably benign |
|
|
R1463:Cntn2
|
UTSW |
1 |
132,448,875 (GRCm39) |
critical splice donor site |
probably null |
|
|
R1512:Cntn2
|
UTSW |
1 |
132,451,430 (GRCm39) |
missense |
probably damaging |
0.99 |
|
R1535:Cntn2
|
UTSW |
1 |
132,453,122 (GRCm39) |
missense |
probably benign |
0.26 |
|
R1686:Cntn2
|
UTSW |
1 |
132,454,049 (GRCm39) |
missense |
possibly damaging |
0.78 |
|
R1696:Cntn2
|
UTSW |
1 |
132,449,017 (GRCm39) |
missense |
probably damaging |
0.96 |
|
R1708:Cntn2
|
UTSW |
1 |
132,446,936 (GRCm39) |
missense |
probably damaging |
0.96 |
|
R2251:Cntn2
|
UTSW |
1 |
132,453,059 (GRCm39) |
missense |
probably damaging |
0.99 |
|
R2315:Cntn2
|
UTSW |
1 |
132,450,735 (GRCm39) |
missense |
probably benign |
0.00 |
|
R2395:Cntn2
|
UTSW |
1 |
132,454,110 (GRCm39) |
missense |
probably benign |
|
|
R3617:Cntn2
|
UTSW |
1 |
132,456,361 (GRCm39) |
missense |
probably benign |
0.16 |
|
R3883:Cntn2
|
UTSW |
1 |
132,456,677 (GRCm39) |
missense |
probably damaging |
0.99 |
|
R3884:Cntn2
|
UTSW |
1 |
132,456,677 (GRCm39) |
missense |
probably damaging |
0.99 |
|
R4060:Cntn2
|
UTSW |
1 |
132,453,634 (GRCm39) |
missense |
probably damaging |
0.99 |
|
R4289:Cntn2
|
UTSW |
1 |
132,455,481 (GRCm39) |
missense |
probably benign |
0.01 |
|
R4710:Cntn2
|
UTSW |
1 |
132,455,963 (GRCm39) |
missense |
possibly damaging |
0.84 |
|
R4921:Cntn2
|
UTSW |
1 |
132,443,770 (GRCm39) |
missense |
possibly damaging |
0.49 |
|
R5121:Cntn2
|
UTSW |
1 |
132,444,798 (GRCm39) |
nonsense |
probably null |
|
|
R5288:Cntn2
|
UTSW |
1 |
132,451,415 (GRCm39) |
missense |
probably benign |
0.18 |
|
R5360:Cntn2
|
UTSW |
1 |
132,446,595 (GRCm39) |
missense |
probably damaging |
0.97 |
|
R5787:Cntn2
|
UTSW |
1 |
132,450,797 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R5817:Cntn2
|
UTSW |
1 |
132,446,486 (GRCm39) |
missense |
probably benign |
0.21 |
|
R5930:Cntn2
|
UTSW |
1 |
132,451,170 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R6053:Cntn2
|
UTSW |
1 |
132,446,090 (GRCm39) |
missense |
probably benign |
0.18 |
|
R7189:Cntn2
|
UTSW |
1 |
132,444,824 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R7352:Cntn2
|
UTSW |
1 |
132,450,137 (GRCm39) |
missense |
probably benign |
0.02 |
|
R7562:Cntn2
|
UTSW |
1 |
132,454,055 (GRCm39) |
missense |
possibly damaging |
0.67 |
|
R7689:Cntn2
|
UTSW |
1 |
132,443,882 (GRCm39) |
missense |
probably benign |
0.00 |
|
R7764:Cntn2
|
UTSW |
1 |
132,450,101 (GRCm39) |
missense |
probably benign |
0.21 |
|
R8080:Cntn2
|
UTSW |
1 |
132,449,536 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R8344:Cntn2
|
UTSW |
1 |
132,449,512 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R8683:Cntn2
|
UTSW |
1 |
132,450,731 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R9087:Cntn2
|
UTSW |
1 |
132,453,108 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R9188:Cntn2
|
UTSW |
1 |
132,443,276 (GRCm39) |
missense |
probably damaging |
1.00 |
|
R9267:Cntn2
|
UTSW |
1 |
132,449,021 (GRCm39) |
missense |
probably benign |
0.02 |
|
R9329:Cntn2
|
UTSW |
1 |
132,456,678 (GRCm39) |
missense |
probably benign |
0.03 |
|
R9385:Cntn2
|
UTSW |
1 |
132,455,912 (GRCm39) |
missense |
probably damaging |
1.00 |
|
X0018:Cntn2
|
UTSW |
1 |
132,461,422 (GRCm39) |
small deletion |
probably benign |
|
|
Z1176:Cntn2
|
UTSW |
1 |
132,455,526 (GRCm39) |
missense |
probably damaging |
1.00 |
|
| Protein Function and Prediction |
Cntn2 encodes the transiently-expressed axonal glycoprotein 1 (TAG1; alternatively TAX1), a cell adhesion immunoglobulin in the contractin family that functions in neurite outgrowth (1-4). In addition to its function in outgrowth, TAG1 is also proposed to function in the guidance and fasciculation of neurites (4;5). It is proposed that TAG1 functions in the initial extension of developing axons within the rodent spinal cord (1). Neurocan and phosphacan/protein-tyrosine phosphatase-η/β are the ligands of TAG1 (2). TAG1 and Caspr2 form a scaffold that functions to maintain K+ channels at the juxtaparanodal region (6).
|
| Expression/Localization |
TAG1 is transiently expressed on subsets of embryonic spinal cord axons (early motor and commissural axons) and growth cones in the developing brain (4;7). Schwann cells and oligodendrocytes also express TAG1 throughout life (8).
|
| Background |
Cntn2tm1Fuka/tm1Fuka; MGI:2181052
involves: 129S1/Sv * 129X1/SvJ * C57BL/6
The morphology of the cerebellum, spinal cord and hippocampus in the homozygous mice are grossly normal (5). Homozygous animals had an upregulation of adenosine A1 receptors in the hippocampus and exhibited greater sensitivity to convulsant stimuli than wild-type animals (5).
Savvaki et al. show that mice with depletion in Tag1 have impaired learning and memory, as well as sensory and motor dysfunction (4). They also observe impairment of juxtaparanodal organization, shortening of internodes and altered VGKC and Caspr2 levels (4). Homozygotes also underperformed in the Morris water maze (MWM) and novel object recognition tests, and also showing reduced spontaneous motor activity, abnormal gait coordination and increased response latency to noxious thermal stimulation (hot-plate test) (4). The molecular organization of juxtaparanodal areas was disrupted and the internodes were shortened in relevant brain areas involved in learning and memory function, coordination, as well as excitability (4).
Cntn2tm1Furl/tm1Furl; MGI:2677610
involves: 129S1/Sv
In homozygous animals, axons are insensitive to wild-type ventral spinal cord (VSC)-derived chemorepellants, abnormal sensory neuron projections, and abnormal spinal cord dorsal horn morphology (9).
Cntn2tm1Furl/tm1Furl; MGI:2677610
involves: 129S1/Sv * C57BL/6
The phenotype of mice in this genetic background are similar to the ones listed above (9).
Cntn2tm2Furl/tm2Furl; MGI:3521785
C57BL/6-Cntn2tm2Furl
Homozygotes in this model have abnormal somatic nervous system physiology in that cultured dorsal root ganglion cells have much less repulsion to ventral spinal cord explants than controls (9).
|
| References |
1. Tsiotra, P. C., Karagogeos, D., Theodorakis, K., Michaelidis, T. M., Modi, W. S., Furley, A. J., Jessell, T. M., and Papamatheakis, J. (1993) Isolation of the cDNA and Chromosomal Localization of the Gene (TAX1) Encoding the Human Axonal Glycoprotein TAG-1. Genomics. 18, 562-567.
2. Milev, P., Maurel, P., Haring, M., Margolis, R. K., and Margolis, R. U. (1996) TAG-1/axonin-1 is a High-Affinity Ligand of Neurocan, phosphacan/protein-Tyrosine Phosphatase-zeta/beta, and N-CAM. J Biol Chem. 271, 15716-15723.
3. Wolfer, D. P., Henehan-Beatty, A., Stoeckli, E. T., Sonderegger, P., and Lipp, H. P. (1994) Distribution of TAG-1/axonin-1 in Fibre Tracts and Migratory Streams of the Developing Mouse Nervous System. J Comp Neurol. 345, 1-32.
4. Savvaki, M., Panagiotaropoulos, T., Stamatakis, A., Sargiannidou, I., Karatzioula, P., Watanabe, K., Stylianopoulou, F., Karagogeos, D., and Kleopa, K. A. (2008) Impairment of Learning and Memory in TAG-1 Deficient Mice Associated with Shorter CNS Internodes and Disrupted Juxtaparanodes. Mol Cell Neurosci. 39, 478-490.
5. Fukamauchi, F., Aihara, O., Wang, Y. J., Akasaka, K., Takeda, Y., Horie, M., Kawano, H., Sudo, K., Asano, M., Watanabe, K., and Iwakura, Y. (2001) TAG-1-Deficient Mice have Marked Elevation of Adenosine A1 Receptors in the Hippocampus. Biochem Biophys Res Commun. 281, 220-226.
6. Poliak, S., Salomon, D., Elhanany, H., Sabanay, H., Kiernan, B., Pevny, L., Stewart, C. L., Xu, X., Chiu, S. Y., Shrager, P., Furley, A. J., and Peles, E. (2003) Juxtaparanodal Clustering of Shaker-Like K+ Channels in Myelinated Axons Depends on Caspr2 and TAG-1. J Cell Biol. 162, 1149-1160.
7. Dodd, J., Morton, S. B., Karagogeos, D., Yamamoto, M., and Jessell, T. M. (1988) Spatial Regulation of Axonal Glycoprotein Expression on Subsets of Embryonic Spinal Neurons. Neuron. 1, 105-116. |
| Posted On |
2012-11-20 |
| Science Writer |
Anne Murray |
Incidental Mutation