Incidental Mutation 'R4915:Fer1l4'
ID 379901
Institutional Source Beutler Lab
Gene Symbol Fer1l4
Ensembl Gene ENSMUSG00000013338
Gene Name fer-1 like family member 4
Synonyms 9130402C12Rik
MMRRC Submission 042517-MU
Accession Numbers
Essential gene? Non essential (E-score: 0.000) question?
Stock # R4915 (G1)
Quality Score 225
Status Validated
Chromosome 2
Chromosomal Location 155861059-155894867 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) T to C at 155873220 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Lysine to Glutamic Acid at position 1287 (K1287E)
Ref Sequence ENSEMBL: ENSMUSP00000105240 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000109611] [ENSMUST00000130764]
AlphaFold no structure available at present
Predicted Effect probably benign
Transcript: ENSMUST00000109611
AA Change: K1287E

PolyPhen 2 Score 0.415 (Sensitivity: 0.89; Specificity: 0.90)
SMART Domains Protein: ENSMUSP00000105240
Gene: ENSMUSG00000013338
AA Change: K1287E

DomainStartEndE-ValueType
PDB:3L9B|A 1 122 1e-12 PDB
Blast:C2 2 96 2e-51 BLAST
low complexity region 159 172 N/A INTRINSIC
low complexity region 178 197 N/A INTRINSIC
C2 228 329 2.87e-7 SMART
FerI 312 383 7.93e-29 SMART
C2 391 501 3.64e-9 SMART
low complexity region 574 581 N/A INTRINSIC
low complexity region 611 622 N/A INTRINSIC
low complexity region 829 837 N/A INTRINSIC
low complexity region 844 855 N/A INTRINSIC
FerB 861 932 7.27e-37 SMART
C2 968 1076 3.73e-6 SMART
low complexity region 1249 1257 N/A INTRINSIC
low complexity region 1280 1310 N/A INTRINSIC
low complexity region 1327 1340 N/A INTRINSIC
low complexity region 1397 1407 N/A INTRINSIC
C2 1449 1548 5.65e-15 SMART
C2 1692 1822 4.22e-5 SMART
Pfam:Ferlin_C 1834 1987 1.6e-74 PFAM
Predicted Effect probably benign
Transcript: ENSMUST00000130764
SMART Domains Protein: ENSMUSP00000114324
Gene: ENSMUSG00000013338

DomainStartEndE-ValueType
Blast:FerB 1 26 3e-9 BLAST
Predicted Effect probably benign
Transcript: ENSMUST00000132912
SMART Domains Protein: ENSMUSP00000123091
Gene: ENSMUSG00000013338

DomainStartEndE-ValueType
low complexity region 14 27 N/A INTRINSIC
low complexity region 84 94 N/A INTRINSIC
Predicted Effect noncoding transcript
Transcript: ENSMUST00000150144
Predicted Effect noncoding transcript
Transcript: ENSMUST00000150538
Meta Mutation Damage Score 0.0898 question?
Coding Region Coverage
  • 1x: 98.9%
  • 3x: 98.0%
  • 10x: 95.1%
  • 20x: 87.9%
Validation Efficiency 98% (162/166)
Allele List at MGI
Other mutations in this stock
Total: 135 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
2700049A03Rik C T 12: 71,236,420 (GRCm39) A1257V possibly damaging Het
Aldh8a1 T C 10: 21,271,662 (GRCm39) S463P probably damaging Het
Angptl1 T G 1: 156,672,388 (GRCm39) D71E probably benign Het
Ank2 T A 3: 126,736,320 (GRCm39) probably benign Het
Ano1 A G 7: 144,165,112 (GRCm39) S649P possibly damaging Het
Arhgef40 A G 14: 52,227,556 (GRCm39) E434G probably damaging Het
Asb15 A T 6: 24,566,292 (GRCm39) D415V probably damaging Het
Baz2b T A 2: 59,744,387 (GRCm39) T1373S possibly damaging Het
Bcas1 T C 2: 170,220,806 (GRCm39) D324G probably damaging Het
Bfsp1 C T 2: 143,669,391 (GRCm39) R396Q probably benign Het
Bmi1 G A 2: 18,687,143 (GRCm39) probably benign Het
Bpifb9b T A 2: 154,156,026 (GRCm39) probably null Het
Brd9 A G 13: 74,086,574 (GRCm39) E25G probably damaging Het
Btbd7 A T 12: 102,804,046 (GRCm39) C331* probably null Het
Ccdc198 A T 14: 49,470,351 (GRCm39) N189K probably benign Het
Cdh26 T C 2: 178,091,614 (GRCm39) S58P probably benign Het
Cenpj T C 14: 56,791,175 (GRCm39) D328G probably damaging Het
Cherp T C 8: 73,222,241 (GRCm39) D255G probably damaging Het
Clec5a T A 6: 40,562,165 (GRCm39) probably benign Het
Cntnap2 T C 6: 46,506,969 (GRCm39) probably benign Het
Col7a1 G A 9: 108,795,532 (GRCm39) G1529E unknown Het
Cybb C G X: 9,316,989 (GRCm39) D246H probably benign Het
Cyp2a22 C A 7: 26,637,195 (GRCm39) E196D probably benign Het
Cyp4f18 T A 8: 72,762,898 (GRCm39) H63L probably damaging Het
Dclk2 A T 3: 86,732,049 (GRCm39) probably null Het
Ddx6 T A 9: 44,524,170 (GRCm39) D82E probably damaging Het
Defb42 A G 14: 63,285,790 (GRCm39) I57V probably benign Het
Dennd5a A G 7: 109,500,296 (GRCm39) F943S probably damaging Het
Dip2c T A 13: 9,671,905 (GRCm39) probably null Het
Disp2 A T 2: 118,620,935 (GRCm39) S556C probably damaging Het
Dnah12 A T 14: 26,455,725 (GRCm39) D816V probably damaging Het
Dpy19l3 T C 7: 35,452,167 (GRCm39) probably benign Het
Efcab11 T C 12: 99,685,321 (GRCm39) D151G probably damaging Het
Ehbp1 T C 11: 22,096,592 (GRCm39) D299G probably benign Het
Evl G T 12: 108,652,365 (GRCm39) R359L probably damaging Het
Fasn T G 11: 120,707,472 (GRCm39) N799T probably benign Het
Fbxo3 T G 2: 103,885,311 (GRCm39) N388K probably damaging Het
Fbxw14 A T 9: 109,103,592 (GRCm39) F40Y possibly damaging Het
Fbxw22 A G 9: 109,213,009 (GRCm39) F313L probably damaging Het
Fn1 A T 1: 71,634,968 (GRCm39) probably null Het
Fry A T 5: 150,402,328 (GRCm39) T790S probably benign Het
Fut8 G T 12: 77,521,818 (GRCm39) A486S probably damaging Het
Gfra1 A T 19: 58,255,522 (GRCm39) S308R probably damaging Het
Gm13030 T A 4: 138,601,239 (GRCm39) probably benign Het
Gm37150 C T 9: 72,292,772 (GRCm39) noncoding transcript Het
Gm6788 C T 19: 28,740,664 (GRCm39) noncoding transcript Het
Gm8122 T C 14: 43,091,573 (GRCm39) N65S unknown Het
Gnb4 C T 3: 32,639,236 (GRCm39) probably benign Het
Gprin1 G T 13: 54,885,886 (GRCm39) P796Q probably damaging Het
Grin1 A G 2: 25,188,565 (GRCm39) probably benign Het
Helz2 T C 2: 180,874,231 (GRCm39) R2088G possibly damaging Het
Hsd3b9 C T 3: 98,357,845 (GRCm39) V56M probably damaging Het
Ighv6-6 C A 12: 114,398,595 (GRCm39) R57L probably damaging Het
Inhca A C 9: 103,129,054 (GRCm39) Y235* probably null Het
Inpp5f A T 7: 128,286,840 (GRCm39) D573V probably damaging Het
Iqgap3 T A 3: 88,008,834 (GRCm39) I643K possibly damaging Het
Itga11 C A 9: 62,659,530 (GRCm39) Y427* probably null Het
Kbtbd8 T G 6: 95,103,515 (GRCm39) M388R possibly damaging Het
Kif1a T A 1: 93,002,700 (GRCm39) E233V probably benign Het
Krt10 T C 11: 99,278,334 (GRCm39) N275S probably damaging Het
Lrrc3 T C 10: 77,737,253 (GRCm39) D61G probably benign Het
Mapk8ip3 A G 17: 25,128,127 (GRCm39) S377P possibly damaging Het
Mccc1 A G 3: 36,051,703 (GRCm39) L32S probably benign Het
Meis1 T C 11: 18,959,222 (GRCm39) probably benign Het
Mmp11 C T 10: 75,761,419 (GRCm39) A31T probably damaging Het
Mthfsl A C 9: 88,597,550 (GRCm39) L67V probably damaging Het
Myo1c T G 11: 75,547,135 (GRCm39) M1R probably null Het
N4bp2 T A 5: 65,960,847 (GRCm39) M506K probably damaging Het
Nfix T C 8: 85,498,458 (GRCm39) I172V probably benign Het
Nid1 A G 13: 13,674,171 (GRCm39) E850G possibly damaging Het
Nlrp9c T C 7: 26,083,885 (GRCm39) T565A probably benign Het
Nomo1 T C 7: 45,693,656 (GRCm39) F163L probably benign Het
Nsd1 T C 13: 55,395,681 (GRCm39) V1197A possibly damaging Het
Nsd1 A G 13: 55,424,341 (GRCm39) T1463A probably benign Het
Nsf G A 11: 103,801,185 (GRCm39) probably benign Het
Or3a1b A T 11: 74,012,705 (GRCm39) I197F probably benign Het
Or4k51 A T 2: 111,584,725 (GRCm39) I44F probably benign Het
Or5an1c A G 19: 12,218,737 (GRCm39) V96A probably benign Het
Or5b106 T A 19: 13,123,355 (GRCm39) I223L possibly damaging Het
Or8k33 A G 2: 86,384,399 (GRCm39) L23P probably damaging Het
Or9g10 T C 2: 85,584,465 (GRCm39) probably benign Het
Pcdha6 T A 18: 37,101,510 (GRCm39) D234E probably damaging Het
Pcnx1 C A 12: 82,021,269 (GRCm39) F1425L probably benign Het
Pdzd9 T G 7: 120,269,391 (GRCm39) N10T possibly damaging Het
Pex6 A T 17: 47,024,982 (GRCm39) H345L probably damaging Het
Pfkfb3 G A 2: 11,495,109 (GRCm39) Q100* probably null Het
Pgm2 G A 5: 64,258,291 (GRCm39) G92E probably damaging Het
Pip4k2c T C 10: 127,035,196 (GRCm39) T391A possibly damaging Het
Plcxd2 C T 16: 45,800,941 (GRCm39) W94* probably null Het
Ppm1k T A 6: 57,487,762 (GRCm39) N354Y probably damaging Het
Prkcg T G 7: 3,378,781 (GRCm39) Y624* probably null Het
Rabep2 T C 7: 126,044,094 (GRCm39) S517P probably damaging Het
Rabgap1l A G 1: 160,269,412 (GRCm39) I717T probably benign Het
Rasef A G 4: 73,649,696 (GRCm39) C484R probably damaging Het
Rdh19 A G 10: 127,686,113 (GRCm39) D75G probably benign Het
Rpl21-ps10 T C 3: 38,161,617 (GRCm39) noncoding transcript Het
Rsl1d1 A T 16: 11,017,593 (GRCm39) probably null Het
Rufy4 T C 1: 74,186,822 (GRCm39) C537R probably damaging Het
Rwdd1 T C 10: 33,885,074 (GRCm39) D62G possibly damaging Het
Scin T A 12: 40,119,373 (GRCm39) I552F possibly damaging Het
Scn3a T C 2: 65,291,799 (GRCm39) N1649S probably damaging Het
Slc20a2 C T 8: 23,051,020 (GRCm39) S351L probably damaging Het
Slc24a1 A T 9: 64,855,213 (GRCm39) F565I unknown Het
Slc4a1 A G 11: 102,243,279 (GRCm39) V784A probably damaging Het
Slf2 T G 19: 44,960,100 (GRCm39) D1022E probably damaging Het
Sox6 T C 7: 115,076,199 (GRCm39) D814G probably damaging Het
Spata4 T C 8: 55,055,471 (GRCm39) probably null Het
Spats2l A T 1: 57,941,347 (GRCm39) K202M probably damaging Het
Speer4b C T 5: 27,705,134 (GRCm39) E80K probably benign Het
Sqle T G 15: 59,193,218 (GRCm39) Y198* probably null Het
Srek1 T C 13: 103,889,194 (GRCm39) probably benign Het
Srek1 T C 13: 103,889,071 (GRCm39) probably benign Het
St14 G A 9: 31,019,960 (GRCm39) R50* probably null Het
Tcaf1 A G 6: 42,652,130 (GRCm39) V784A probably damaging Het
Tfr2 C T 5: 137,581,673 (GRCm39) R587W probably damaging Het
Tmpo A G 10: 90,985,411 (GRCm39) V357A probably damaging Het
Trrap A T 5: 144,742,545 (GRCm39) I1101F probably damaging Het
Ttn A T 2: 76,641,587 (GRCm39) L5176Q possibly damaging Het
Ttpal G A 2: 163,449,397 (GRCm39) R84H probably damaging Het
Tyk2 T C 9: 21,022,433 (GRCm39) T799A probably benign Het
Ugt1a10 A T 1: 87,983,646 (GRCm39) D148V probably damaging Het
Usp29 C T 7: 6,964,504 (GRCm39) P116S probably benign Het
Usp8 A T 2: 126,562,060 (GRCm39) K85* probably null Het
Usp9y C T Y: 1,316,735 (GRCm39) R1938H probably damaging Het
Vmn1r90 T G 7: 14,295,950 (GRCm39) R49S possibly damaging Het
Vmn2r71 C A 7: 85,270,476 (GRCm39) N547K probably damaging Het
Vps45 T C 3: 95,926,943 (GRCm39) T535A probably damaging Het
Yars1 A T 4: 129,104,384 (GRCm39) probably benign Het
Zfp114 T C 7: 23,877,290 (GRCm39) L44P probably damaging Het
Zfp36l2 A G 17: 84,493,690 (GRCm39) probably benign Het
Zfp512 T C 5: 31,634,209 (GRCm39) S407P probably damaging Het
Zfp574 C T 7: 24,780,151 (GRCm39) P391L probably damaging Het
Zfp607a T G 7: 27,577,985 (GRCm39) C352G probably benign Het
Zfp791 T A 8: 85,837,580 (GRCm39) I95L probably benign Het
Zfr A C 15: 12,162,198 (GRCm39) probably null Het
Other mutations in Fer1l4
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00417:Fer1l4 APN 2 155,861,840 (GRCm39) nonsense probably null
IGL01025:Fer1l4 APN 2 155,894,105 (GRCm39) missense probably benign 0.41
IGL01103:Fer1l4 APN 2 155,886,361 (GRCm39) critical splice donor site probably null
IGL01322:Fer1l4 APN 2 155,862,259 (GRCm39) splice site probably null
IGL01391:Fer1l4 APN 2 155,878,376 (GRCm39) missense probably damaging 1.00
IGL02176:Fer1l4 APN 2 155,890,371 (GRCm39) missense probably benign
IGL02267:Fer1l4 APN 2 155,873,172 (GRCm39) missense possibly damaging 0.60
IGL02291:Fer1l4 APN 2 155,861,458 (GRCm39) missense probably damaging 1.00
IGL02385:Fer1l4 APN 2 155,887,348 (GRCm39) missense probably benign 0.04
IGL02423:Fer1l4 APN 2 155,894,827 (GRCm39) missense probably benign 0.04
IGL02596:Fer1l4 APN 2 155,881,052 (GRCm39) missense probably benign
IGL02612:Fer1l4 APN 2 155,889,848 (GRCm39) missense probably damaging 1.00
IGL02716:Fer1l4 APN 2 155,871,635 (GRCm39) missense probably damaging 1.00
IGL02738:Fer1l4 APN 2 155,887,648 (GRCm39) missense probably benign
IGL03035:Fer1l4 APN 2 155,864,526 (GRCm39) missense possibly damaging 0.95
IGL03083:Fer1l4 APN 2 155,881,286 (GRCm39) unclassified probably benign
IGL03201:Fer1l4 APN 2 155,886,650 (GRCm39) missense probably benign 0.32
IGL03349:Fer1l4 APN 2 155,886,654 (GRCm39) nonsense probably null
R0033:Fer1l4 UTSW 2 155,866,026 (GRCm39) splice site probably benign
R0356:Fer1l4 UTSW 2 155,865,930 (GRCm39) missense probably damaging 1.00
R0477:Fer1l4 UTSW 2 155,894,806 (GRCm39) missense probably benign 0.43
R0504:Fer1l4 UTSW 2 155,894,115 (GRCm39) missense probably benign 0.36
R0731:Fer1l4 UTSW 2 155,865,990 (GRCm39) missense probably benign 0.17
R0800:Fer1l4 UTSW 2 155,887,583 (GRCm39) missense possibly damaging 0.90
R0884:Fer1l4 UTSW 2 155,861,233 (GRCm39) missense possibly damaging 0.93
R1017:Fer1l4 UTSW 2 155,891,398 (GRCm39) critical splice acceptor site probably null
R1266:Fer1l4 UTSW 2 155,888,169 (GRCm39) missense possibly damaging 0.89
R1544:Fer1l4 UTSW 2 155,887,553 (GRCm39) missense probably benign 0.00
R1657:Fer1l4 UTSW 2 155,877,518 (GRCm39) missense possibly damaging 0.95
R1699:Fer1l4 UTSW 2 155,871,605 (GRCm39) missense probably benign 0.14
R1816:Fer1l4 UTSW 2 155,877,119 (GRCm39) missense probably damaging 0.98
R1950:Fer1l4 UTSW 2 155,890,194 (GRCm39) missense probably damaging 1.00
R2117:Fer1l4 UTSW 2 155,881,038 (GRCm39) missense probably benign 0.00
R2219:Fer1l4 UTSW 2 155,873,684 (GRCm39) missense probably damaging 0.99
R2220:Fer1l4 UTSW 2 155,873,684 (GRCm39) missense probably damaging 0.99
R2879:Fer1l4 UTSW 2 155,894,120 (GRCm39) missense probably damaging 1.00
R3746:Fer1l4 UTSW 2 155,876,968 (GRCm39) missense probably benign 0.01
R3806:Fer1l4 UTSW 2 155,887,603 (GRCm39) missense probably damaging 1.00
R3807:Fer1l4 UTSW 2 155,887,603 (GRCm39) missense probably damaging 1.00
R4224:Fer1l4 UTSW 2 155,862,309 (GRCm39) missense probably benign 0.37
R4274:Fer1l4 UTSW 2 155,862,464 (GRCm39) missense probably damaging 1.00
R4569:Fer1l4 UTSW 2 155,878,559 (GRCm39) missense possibly damaging 0.77
R4619:Fer1l4 UTSW 2 155,889,007 (GRCm39) missense probably damaging 1.00
R4707:Fer1l4 UTSW 2 155,887,543 (GRCm39) missense possibly damaging 0.69
R4914:Fer1l4 UTSW 2 155,873,220 (GRCm39) missense probably benign 0.41
R4917:Fer1l4 UTSW 2 155,873,220 (GRCm39) missense probably benign 0.41
R4918:Fer1l4 UTSW 2 155,873,220 (GRCm39) missense probably benign 0.41
R4941:Fer1l4 UTSW 2 155,887,009 (GRCm39) missense probably damaging 1.00
R5011:Fer1l4 UTSW 2 155,873,135 (GRCm39) missense probably damaging 1.00
R5013:Fer1l4 UTSW 2 155,873,135 (GRCm39) missense probably damaging 1.00
R5130:Fer1l4 UTSW 2 155,891,386 (GRCm39) missense possibly damaging 0.54
R5385:Fer1l4 UTSW 2 155,879,286 (GRCm39) nonsense probably null
R5441:Fer1l4 UTSW 2 155,865,177 (GRCm39) missense probably benign 0.00
R5555:Fer1l4 UTSW 2 155,890,109 (GRCm39) missense probably damaging 1.00
R5838:Fer1l4 UTSW 2 155,893,913 (GRCm39) missense probably benign 0.01
R6125:Fer1l4 UTSW 2 155,888,907 (GRCm39) missense probably damaging 1.00
R6184:Fer1l4 UTSW 2 155,890,211 (GRCm39) missense probably damaging 1.00
R6246:Fer1l4 UTSW 2 155,866,902 (GRCm39) missense probably damaging 0.99
R6248:Fer1l4 UTSW 2 155,888,091 (GRCm39) missense probably damaging 1.00
R6274:Fer1l4 UTSW 2 155,871,188 (GRCm39) missense probably damaging 1.00
R6298:Fer1l4 UTSW 2 155,866,660 (GRCm39) missense probably damaging 1.00
R6362:Fer1l4 UTSW 2 155,890,170 (GRCm39) missense probably benign 0.08
R6490:Fer1l4 UTSW 2 155,889,834 (GRCm39) missense possibly damaging 0.94
R6494:Fer1l4 UTSW 2 155,887,390 (GRCm39) missense probably benign 0.02
R6516:Fer1l4 UTSW 2 155,877,119 (GRCm39) missense probably damaging 0.98
R6530:Fer1l4 UTSW 2 155,889,785 (GRCm39) critical splice donor site probably null
R6740:Fer1l4 UTSW 2 155,873,142 (GRCm39) missense probably damaging 1.00
R7039:Fer1l4 UTSW 2 155,878,650 (GRCm39) missense probably benign 0.05
R7121:Fer1l4 UTSW 2 155,886,477 (GRCm39) missense probably benign 0.13
R7132:Fer1l4 UTSW 2 155,887,546 (GRCm39) missense probably damaging 0.98
R7382:Fer1l4 UTSW 2 155,862,669 (GRCm39) nonsense probably null
R7631:Fer1l4 UTSW 2 155,890,195 (GRCm39) missense probably damaging 1.00
R7693:Fer1l4 UTSW 2 155,862,351 (GRCm39) missense possibly damaging 0.51
R7730:Fer1l4 UTSW 2 155,890,854 (GRCm39) missense probably benign
R8021:Fer1l4 UTSW 2 155,864,511 (GRCm39) missense probably damaging 0.98
R8161:Fer1l4 UTSW 2 155,866,555 (GRCm39) missense probably benign 0.03
R8171:Fer1l4 UTSW 2 155,890,151 (GRCm39) missense probably benign 0.29
R8241:Fer1l4 UTSW 2 155,891,585 (GRCm39) missense probably benign
R8245:Fer1l4 UTSW 2 155,886,934 (GRCm39) critical splice donor site probably null
R8280:Fer1l4 UTSW 2 155,891,620 (GRCm39) missense probably damaging 1.00
R8369:Fer1l4 UTSW 2 155,861,680 (GRCm39) missense probably benign 0.17
R8403:Fer1l4 UTSW 2 155,894,163 (GRCm39) missense possibly damaging 0.88
R8702:Fer1l4 UTSW 2 155,861,310 (GRCm39) missense probably benign 0.00
R8804:Fer1l4 UTSW 2 155,893,914 (GRCm39) missense probably benign 0.28
R8814:Fer1l4 UTSW 2 155,894,163 (GRCm39) missense probably benign 0.04
R8817:Fer1l4 UTSW 2 155,890,143 (GRCm39) missense probably damaging 0.99
R9325:Fer1l4 UTSW 2 155,877,934 (GRCm39) missense probably damaging 1.00
R9342:Fer1l4 UTSW 2 155,877,196 (GRCm39) missense probably benign 0.08
R9527:Fer1l4 UTSW 2 155,871,617 (GRCm39) missense probably damaging 0.96
R9661:Fer1l4 UTSW 2 155,862,336 (GRCm39) missense probably damaging 0.98
RF030:Fer1l4 UTSW 2 155,887,449 (GRCm39) small deletion probably benign
X0063:Fer1l4 UTSW 2 155,876,931 (GRCm39) missense probably damaging 1.00
Z1177:Fer1l4 UTSW 2 155,890,349 (GRCm39) missense probably null 1.00
Predicted Primers PCR Primer
(F):5'- TTCTTGAACACACAGGGGTC -3'
(R):5'- CCGGAGTCTGCTTTCTACTG -3'

Sequencing Primer
(F):5'- CAGGGGTCTGTTGCCTGAGAC -3'
(R):5'- TGGCCTAAACTCATGGCATC -3'
Posted On 2016-04-15