Incidental Mutation 'G4846:Samd4'
ID523
Institutional Source Beutler Lab
Gene Symbol Samd4
Ensembl Gene ENSMUSG00000021838
Gene Namesterile alpha motif domain containing 4
Synonyms4933436G17Rik, 1700024G08Rik, Smaug, 1700111L17Rik
Accession Numbers

Genbank: NM_001037221, NM_028966, NM_001163433

Is this an essential gene? Probably essential (E-score: 0.871) question?
Stock #G4846 (G3) of strain Worker
Quality Score
Status Validated
Chromosome14
Chromosomal Location46882854-47105815 bp(+) (GRCm38)
Type of Mutationmissense
DNA Base Change (assembly) T to A at 47016319 bp
ZygosityHeterozygous
Amino Acid Change Isoleucine to Asparagine at position 80 (I80N)
Ref Sequence ENSEMBL: ENSMUSP00000114621 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000022386] [ENSMUST00000100672] [ENSMUST00000125113] [ENSMUST00000137543] [ENSMUST00000228404]
Predicted Effect probably damaging
Transcript: ENSMUST00000022386
AA Change: I80N

PolyPhen 2 Score 1.000 (Sensitivity: 0.00; Specificity: 1.00)
SMART Domains Protein: ENSMUSP00000022386
Gene: ENSMUSG00000021838
AA Change: I80N

DomainStartEndE-ValueType
low complexity region 82 95 N/A INTRINSIC
low complexity region 292 305 N/A INTRINSIC
SAM 320 383 1.4e-7 SMART
low complexity region 445 463 N/A INTRINSIC
Predicted Effect probably damaging
Transcript: ENSMUST00000100672
AA Change: I80N

PolyPhen 2 Score 1.000 (Sensitivity: 0.00; Specificity: 1.00)
SMART Domains Protein: ENSMUSP00000098237
Gene: ENSMUSG00000021838
AA Change: I80N

DomainStartEndE-ValueType
low complexity region 82 95 N/A INTRINSIC
SAM 232 295 2.75e-6 SMART
low complexity region 357 375 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000125113
SMART Domains Protein: ENSMUSP00000122833
Gene: ENSMUSG00000021838

DomainStartEndE-ValueType
low complexity region 191 204 N/A INTRINSIC
SAM 219 282 1.4e-7 SMART
low complexity region 344 362 N/A INTRINSIC
Predicted Effect probably damaging
Transcript: ENSMUST00000137543
AA Change: I80N

PolyPhen 2 Score 1.000 (Sensitivity: 0.00; Specificity: 1.00)
SMART Domains Protein: ENSMUSP00000114621
Gene: ENSMUSG00000021838
AA Change: I80N

DomainStartEndE-ValueType
low complexity region 82 95 N/A INTRINSIC
SAM 232 295 2.75e-6 SMART
low complexity region 357 375 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000228404
Meta Mutation Damage Score 0.5710 question?
Coding Region Coverage
  • 1x: 77.7%
  • 3x: 53.3%
Het Detection Efficiency29.1%
Validation Efficiency 90% (104/115)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] Sterile alpha motifs (SAMs) in proteins such as SAMD4A are part of an RNA-binding domain that functions as a posttranscriptional regulator by binding to an RNA sequence motif known as the Smaug recognition element, which was named after the Drosophila Smaug protein (Baez and Boccaccio, 2005 [PubMed 16221671]).[supplied by OMIM, Mar 2008]
PHENOTYPE: Mice homozygous for an ENU-induced allele exhibit leaness, myopathy and altered glucose metabolism. Mice homozygous for a spontaneous mutation exhibit kyphosis, abnormal gait, and decreased cortical bone thickness. [provided by MGI curators]
Allele List at MGI

ll alleles(1) : Gene trapped(1)

Other mutations in this stock
Total: 11 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
2700049A03Rik A G 12: 71,137,909 I24V probably benign Het
Col4a2 T C 8: 11,408,872 probably benign Homo
Cyp3a13 C T 5: 137,898,823 E410K possibly damaging Het
Gm20518 A T 16: 17,836,645 probably benign Homo
Nbea T A 3: 56,087,497 D166V probably damaging Het
Olfr221 T A 14: 52,035,977 M45L probably benign Het
Olfr794 A T 10: 129,571,170 I172F probably damaging Het
Plxna4 T A 6: 32,192,272 D1330V probably damaging Het
Ppl A G 16: 5,087,206 S1742P probably damaging Homo
Spinkl T A 18: 44,169,106 probably benign Het
Ttll5 T A 12: 86,024,244 I1297N probably damaging Het
Other mutations in Samd4
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00557:Samd4 APN 14 47052898 missense probably damaging 1.00
IGL01413:Samd4 APN 14 47016792 missense probably benign 0.01
supermodel UTSW 14 47016337 missense probably damaging 1.00
B6584:Samd4 UTSW 14 47016337 missense probably damaging 1.00
R0096:Samd4 UTSW 14 47064297 missense possibly damaging 0.88
R0122:Samd4 UTSW 14 47016560 missense probably benign 0.44
R0562:Samd4 UTSW 14 47077509 missense probably damaging 1.00
R1247:Samd4 UTSW 14 47064328 critical splice donor site probably benign
R1247:Samd4 UTSW 14 47087758 small insertion probably benign
R1771:Samd4 UTSW 14 47089075 missense probably damaging 1.00
R1902:Samd4 UTSW 14 47074128 missense probably damaging 1.00
R1903:Samd4 UTSW 14 47074128 missense probably damaging 1.00
R2346:Samd4 UTSW 14 46884842 missense probably damaging 1.00
R4155:Samd4 UTSW 14 47052946 missense possibly damaging 0.74
R4498:Samd4 UTSW 14 47096109 missense probably damaging 1.00
R4510:Samd4 UTSW 14 47077585 missense probably benign 0.05
R4511:Samd4 UTSW 14 47077585 missense probably benign 0.05
R4658:Samd4 UTSW 14 47064246 missense probably damaging 1.00
R4871:Samd4 UTSW 14 47066463 missense probably damaging 1.00
R4991:Samd4 UTSW 14 47074010 missense probably damaging 0.97
R5432:Samd4 UTSW 14 47074062 missense probably benign 0.09
R5687:Samd4 UTSW 14 47016565 missense probably benign
R6035:Samd4 UTSW 14 47087872 missense probably damaging 1.00
R6035:Samd4 UTSW 14 47087872 missense probably damaging 1.00
R6254:Samd4 UTSW 14 47016631 missense probably damaging 1.00
R6366:Samd4 UTSW 14 47074150 critical splice donor site probably null
R6376:Samd4 UTSW 14 47052962 missense probably damaging 1.00
R6944:Samd4 UTSW 14 47016635 missense possibly damaging 0.94
R7035:Samd4 UTSW 14 47089163 synonymous silent
R7148:Samd4 UTSW 14 47016683 missense probably benign 0.09
R7467:Samd4 UTSW 14 47087856 missense probably benign 0.19
R7999:Samd4 UTSW 14 47064247 missense probably damaging 0.99
R8301:Samd4 UTSW 14 47016678 missense probably benign
R8306:Samd4 UTSW 14 46884917 missense probably damaging 1.00
R8351:Samd4 UTSW 14 47101431 missense probably damaging 1.00
R8451:Samd4 UTSW 14 47101431 missense probably damaging 1.00
X0018:Samd4 UTSW 14 47016696 missense possibly damaging 0.94
X0022:Samd4 UTSW 14 47074017 missense probably benign 0.45
Z0001:Samd4 UTSW 14 47016337 missense probably damaging 1.00
Nature of Mutation
DNA sequencing using the SOLiD technique identified an A to T transversion at position 865 of the Samd4 transcript using Genbank record NM_001037221 in exon 4 of 14 total exons. Multiple transcripts of the Samd4 gene are displayed on Ensembl and Vega. The mutated nucleotide causes an isoleucine to asparagine substitution at amino acid 80 of the encoded protein. The mutation has been confirmed by DNA sequencing using the Sanger method (Figure 1).
Protein Function and Prediction

The Samd4 gene encodes a 711 amino acid protein that belongs to the SMAUG family. Sterile alpha motif-containing RNA-binding proteins constitute a novel family of post-transcriptional regulators that recognize a specific RNA sequence motif known as Smaug recognition element (SRE). The protein contains a  SAM (sterile alpha motif) domain at residues 323-396. Four isoforms are produced by alternative splicing (Uniprot Q8CBY1).

The amino acid altered by the Worker mutation in the Samd4 gene is located only in isoforms 1 and 3, and is predicted to be probably damaging by the PolyPhen program.
Posted On2010-11-02