Incidental Mutation 'R9282:Ttc21b'
ID 703675
Institutional Source Beutler Lab
Gene Symbol Ttc21b
Ensembl Gene ENSMUSG00000034848
Gene Name tetratricopeptide repeat domain 21B
Synonyms Thm1, line 158, aln, 2410066K11Rik
MMRRC Submission
Accession Numbers
Essential gene? Essential (E-score: 1.000) question?
Stock # R9282 (G1)
Quality Score 225.009
Status Not validated
Chromosome 2
Chromosomal Location 66014671-66086961 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to G at 66056349 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Valine to Alanine at position 679 (V679A)
Ref Sequence ENSEMBL: ENSMUSP00000099779 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000102718] [ENSMUST00000125446]
AlphaFold Q0HA38
Predicted Effect possibly damaging
Transcript: ENSMUST00000102718
AA Change: V679A

PolyPhen 2 Score 0.651 (Sensitivity: 0.87; Specificity: 0.91)
SMART Domains Protein: ENSMUSP00000099779
Gene: ENSMUSG00000034848
AA Change: V679A

DomainStartEndE-ValueType
Blast:TPR 109 141 5e-12 BLAST
Blast:TPR 178 211 3e-12 BLAST
TPR 324 357 4.21e1 SMART
low complexity region 379 390 N/A INTRINSIC
TPR 492 525 8.51e0 SMART
TPR 526 559 5.92e1 SMART
TPR 563 596 7.69e1 SMART
TPR 721 754 3.07e-5 SMART
TPR 755 788 9.45e0 SMART
TPR 790 821 9.24e1 SMART
TPR 830 863 3.05e0 SMART
TPR 883 916 1.55e-1 SMART
TPR 917 950 8.74e0 SMART
TPR 951 984 6.75e1 SMART
Blast:TPR 1023 1054 5e-13 BLAST
Blast:TPR 1156 1189 1e-12 BLAST
TPR 1196 1229 9.7e0 SMART
TPR 1265 1298 1.02e1 SMART
Predicted Effect possibly damaging
Transcript: ENSMUST00000125446
AA Change: V679A

PolyPhen 2 Score 0.651 (Sensitivity: 0.87; Specificity: 0.91)
SMART Domains Protein: ENSMUSP00000131758
Gene: ENSMUSG00000034848
AA Change: V679A

DomainStartEndE-ValueType
Blast:TPR 108 141 3e-12 BLAST
Blast:TPR 178 211 3e-12 BLAST
TPR 324 357 4.21e1 SMART
low complexity region 379 390 N/A INTRINSIC
TPR 492 525 8.51e0 SMART
TPR 526 559 5.92e1 SMART
TPR 563 596 7.69e1 SMART
TPR 721 754 3.07e-5 SMART
TPR 755 788 9.45e0 SMART
TPR 790 821 9.24e1 SMART
TPR 830 863 3.05e0 SMART
TPR 883 916 1.55e-1 SMART
TPR 917 950 8.74e0 SMART
TPR 951 984 6.75e1 SMART
Blast:TPR 1023 1054 4e-13 BLAST
Blast:TPR 1156 1189 9e-13 BLAST
TPR 1196 1229 9.7e0 SMART
Coding Region Coverage
  • 1x: 100.0%
  • 3x: 99.9%
  • 10x: 99.7%
  • 20x: 98.9%
Validation Efficiency
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a member of TTC21 family, containing several tetratricopeptide repeat (TPR) domains. This protein is localized to the cilium axoneme, and may play a role in retrograde intraflagellar transport in cilia. Mutations in this gene are associated with various ciliopathies, nephronophthisis 12, and asphyxiating thoracic dystrophy 4. [provided by RefSeq, Oct 2011]
PHENOTYPE: Homozygous mutation of this gene is embryonic lethal. Mutant embryos exhibit several deformities including polydactyly, microphthalmia, irregular shape of the long bones, rib fusion and truncation, neural tube defects, and abnormal brain structure. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 54 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Abi3bp G A 16: 56,440,867 (GRCm39) V701M unknown Het
Adam2 G A 14: 66,267,238 (GRCm39) P674S probably benign Het
Adam24 T A 8: 41,133,674 (GRCm39) Y381N probably damaging Het
Adgrv1 A G 13: 81,251,491 (GRCm39) S6209P probably damaging Het
Aox4 A T 1: 58,285,028 (GRCm39) K593N possibly damaging Het
Aqp3 A G 4: 41,093,640 (GRCm39) V258A possibly damaging Het
Atg16l1 T A 1: 87,707,906 (GRCm39) F390I possibly damaging Het
B4galt6 T A 18: 20,825,509 (GRCm39) Y239F possibly damaging Het
Cmtr2 T C 8: 110,948,977 (GRCm39) M429T probably benign Het
Col5a2 C G 1: 45,478,029 (GRCm39) probably null Het
Dcc T C 18: 71,815,249 (GRCm39) D375G possibly damaging Het
Dnah14 T C 1: 181,642,077 (GRCm39) Y31H Het
Fam131a G A 16: 20,520,243 (GRCm39) R232H possibly damaging Het
Fam186a A G 15: 99,839,879 (GRCm39) Y2122H probably damaging Het
Focad A T 4: 88,115,059 (GRCm39) I421F unknown Het
Fscb T G 12: 64,520,097 (GRCm39) E456D possibly damaging Het
Furin C A 7: 80,040,846 (GRCm39) S664I probably benign Het
Ganc A G 2: 120,290,381 (GRCm39) E906G probably benign Het
Gdf5 C G 2: 155,783,915 (GRCm39) D346H probably damaging Het
Golga4 T C 9: 118,385,893 (GRCm39) L1005P probably damaging Het
Ifit1bl1 T C 19: 34,571,908 (GRCm39) N183S probably benign Het
Itpr1 T A 6: 108,370,984 (GRCm39) F1084I probably damaging Het
Katnal1 A T 5: 148,831,021 (GRCm39) Y184* probably null Het
Lrrc37a A G 11: 103,391,633 (GRCm39) I1264T probably benign Het
Map3k2 T A 18: 32,342,805 (GRCm39) M234K probably damaging Het
Mcm3ap T A 10: 76,342,352 (GRCm39) V1615E probably damaging Het
Mkrn2 A G 6: 115,591,534 (GRCm39) probably null Het
Nicn1 C T 9: 108,171,708 (GRCm39) R163C possibly damaging Het
Nradd T A 9: 110,450,751 (GRCm39) Q142L possibly damaging Het
Ophn1 G A X: 97,622,145 (GRCm39) T668M probably benign Het
Or56b35 T C 7: 104,963,781 (GRCm39) I190T probably benign Het
Pdzd7 A G 19: 45,028,622 (GRCm39) F174L probably damaging Het
Pi4k2b C T 5: 52,900,879 (GRCm39) T99I probably benign Het
Pigv A T 4: 133,391,973 (GRCm39) V399D probably damaging Het
Pla2g4a C A 1: 149,747,207 (GRCm39) L326F probably damaging Het
Psmg1 T C 16: 95,790,717 (GRCm39) I73M probably damaging Het
Rcl1 T C 19: 29,093,170 (GRCm39) S62P probably damaging Het
Slc23a4 T A 6: 34,955,861 (GRCm39) I58F probably damaging Het
Slc36a2 G T 11: 55,060,837 (GRCm39) T191K probably benign Het
Sorbs2 T G 8: 46,248,774 (GRCm39) V675G probably benign Het
Tbc1d30 T C 10: 121,142,128 (GRCm39) probably null Het
Tbc1d4 A G 14: 101,845,616 (GRCm39) V94A possibly damaging Het
Tdrd5 T C 1: 156,105,030 (GRCm39) Y532C probably benign Het
Tll2 T A 19: 41,074,772 (GRCm39) I931L probably benign Het
Tlr3 T C 8: 45,851,643 (GRCm39) N418S probably benign Het
Tmco1 C T 1: 167,136,132 (GRCm39) probably benign Het
Tshr T A 12: 91,474,518 (GRCm39) M164K possibly damaging Het
Ttn A G 2: 76,730,861 (GRCm39) Y4951H unknown Het
Usf1 T A 1: 171,243,373 (GRCm39) V50D possibly damaging Het
Utp6 A T 11: 79,826,851 (GRCm39) M575K probably benign Het
Vmn1r197 A T 13: 22,512,608 (GRCm39) R176S possibly damaging Het
Vmn2r104 A T 17: 20,261,098 (GRCm39) F442I probably damaging Het
Vmn2r94 A G 17: 18,497,751 (GRCm39) F7S possibly damaging Het
Vps41 G T 13: 19,013,401 (GRCm39) E340* probably null Het
Other mutations in Ttc21b
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00465:Ttc21b APN 2 66,073,119 (GRCm39) missense probably benign 0.00
IGL00467:Ttc21b APN 2 66,018,708 (GRCm39) missense probably damaging 1.00
IGL00721:Ttc21b APN 2 66,057,122 (GRCm39) missense probably benign 0.06
IGL00837:Ttc21b APN 2 66,065,915 (GRCm39) critical splice donor site probably null
IGL01317:Ttc21b APN 2 66,018,700 (GRCm39) missense probably benign 0.00
IGL01485:Ttc21b APN 2 66,082,234 (GRCm39) splice site probably benign
IGL01739:Ttc21b APN 2 66,068,200 (GRCm39) missense probably benign
IGL02282:Ttc21b APN 2 66,022,081 (GRCm39) missense probably damaging 0.96
IGL02431:Ttc21b APN 2 66,082,229 (GRCm39) splice site probably benign
IGL02478:Ttc21b APN 2 66,018,624 (GRCm39) missense probably benign 0.05
IGL02487:Ttc21b APN 2 66,065,500 (GRCm39) missense probably benign 0.02
IGL03327:Ttc21b APN 2 66,068,192 (GRCm39) missense possibly damaging 0.92
IGL03346:Ttc21b APN 2 66,068,192 (GRCm39) missense possibly damaging 0.92
plus-sized UTSW 2 66,073,023 (GRCm39) missense probably damaging 1.00
puffer UTSW 2 66,057,244 (GRCm39) missense probably benign 0.12
PIT4696001:Ttc21b UTSW 2 66,061,563 (GRCm39) splice site probably null
R0049:Ttc21b UTSW 2 66,053,908 (GRCm39) missense probably damaging 1.00
R0049:Ttc21b UTSW 2 66,053,908 (GRCm39) missense probably damaging 1.00
R0373:Ttc21b UTSW 2 66,018,670 (GRCm39) missense probably damaging 0.99
R0440:Ttc21b UTSW 2 66,066,726 (GRCm39) missense probably benign 0.03
R0504:Ttc21b UTSW 2 66,053,142 (GRCm39) splice site probably benign
R0600:Ttc21b UTSW 2 66,069,914 (GRCm39) missense probably damaging 0.99
R0621:Ttc21b UTSW 2 66,056,355 (GRCm39) missense probably benign 0.07
R0633:Ttc21b UTSW 2 66,066,577 (GRCm39) missense probably benign
R0863:Ttc21b UTSW 2 66,073,117 (GRCm39) missense probably benign
R1617:Ttc21b UTSW 2 66,056,379 (GRCm39) missense probably benign 0.22
R1837:Ttc21b UTSW 2 66,028,106 (GRCm39) missense probably benign 0.01
R1844:Ttc21b UTSW 2 66,053,921 (GRCm39) nonsense probably null
R2120:Ttc21b UTSW 2 66,057,098 (GRCm39) missense probably benign 0.12
R2205:Ttc21b UTSW 2 66,065,467 (GRCm39) missense possibly damaging 0.51
R2392:Ttc21b UTSW 2 66,037,794 (GRCm39) critical splice donor site probably null
R3689:Ttc21b UTSW 2 66,054,488 (GRCm39) missense probably benign 0.22
R3810:Ttc21b UTSW 2 66,082,577 (GRCm39) critical splice acceptor site probably null
R3847:Ttc21b UTSW 2 66,073,023 (GRCm39) missense probably damaging 1.00
R3897:Ttc21b UTSW 2 66,065,413 (GRCm39) missense probably benign 0.01
R4561:Ttc21b UTSW 2 66,016,562 (GRCm39) missense probably damaging 1.00
R4671:Ttc21b UTSW 2 66,057,257 (GRCm39) missense possibly damaging 0.66
R5161:Ttc21b UTSW 2 66,059,367 (GRCm39) missense probably damaging 0.98
R5274:Ttc21b UTSW 2 66,066,627 (GRCm39) missense possibly damaging 0.89
R5594:Ttc21b UTSW 2 66,066,579 (GRCm39) missense probably benign 0.39
R6210:Ttc21b UTSW 2 66,066,698 (GRCm39) missense probably benign 0.00
R6305:Ttc21b UTSW 2 66,018,614 (GRCm39) missense probably damaging 0.99
R6456:Ttc21b UTSW 2 66,018,675 (GRCm39) missense probably damaging 0.97
R6482:Ttc21b UTSW 2 66,057,244 (GRCm39) missense probably benign 0.12
R6645:Ttc21b UTSW 2 66,066,721 (GRCm39) missense probably benign 0.01
R6800:Ttc21b UTSW 2 66,038,994 (GRCm39) splice site probably null
R6815:Ttc21b UTSW 2 66,057,134 (GRCm39) missense probably benign 0.00
R6959:Ttc21b UTSW 2 66,061,656 (GRCm39) missense probably benign 0.05
R7125:Ttc21b UTSW 2 66,066,670 (GRCm39) missense probably benign 0.00
R7265:Ttc21b UTSW 2 66,040,517 (GRCm39) missense possibly damaging 0.89
R7283:Ttc21b UTSW 2 66,039,062 (GRCm39) missense probably damaging 0.96
R7560:Ttc21b UTSW 2 66,047,548 (GRCm39) missense possibly damaging 0.69
R7561:Ttc21b UTSW 2 66,047,548 (GRCm39) missense possibly damaging 0.69
R7816:Ttc21b UTSW 2 66,077,705 (GRCm39) missense possibly damaging 0.82
R8172:Ttc21b UTSW 2 66,082,500 (GRCm39) missense probably benign 0.01
R8179:Ttc21b UTSW 2 66,031,824 (GRCm39) missense probably benign
R9047:Ttc21b UTSW 2 66,031,596 (GRCm39) missense
R9336:Ttc21b UTSW 2 66,057,287 (GRCm39) missense probably benign
R9464:Ttc21b UTSW 2 66,053,866 (GRCm39) missense probably damaging 1.00
X0013:Ttc21b UTSW 2 66,056,294 (GRCm39) nonsense probably null
Predicted Primers PCR Primer
(F):5'- AGAAGGAAGATGACCATTTCCAGAC -3'
(R):5'- CGGGTAACTCATCGCCTATTTTG -3'

Sequencing Primer
(F):5'- GGATTTGTGACATACATGACAGG -3'
(R):5'- GGTAACTCATCGCCTATTTTGAACAG -3'
Posted On 2022-03-25