Incidental Mutation 'B5639:Incenp'
ID 544
Institutional Source Beutler Lab
Gene Symbol Incenp
Ensembl Gene ENSMUSG00000024660
Gene Name inner centromere protein
Synonyms 2700067E22Rik
Accession Numbers

Genbank: NM_016692

Is this an essential gene? Essential (E-score: 1.000) question?
Stock # B5639 of strain 3d
Quality Score
Status Validated
Chromosome 19
Chromosomal Location 9872297-9899533 bp(-) (GRCm38)
Type of Mutation missense
DNA Base Change (assembly) G to A at 9893818 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change Threonine to Isoleucine at position 149 (T149I)
Ref Sequence ENSEMBL: ENSMUSP00000025562 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000025562]
AlphaFold Q9WU62
Predicted Effect unknown
Transcript: ENSMUST00000025562
AA Change: T149I
SMART Domains Protein: ENSMUSP00000025562
Gene: ENSMUSG00000024660
AA Change: T149I

Pfam:INCENP_N 6 41 1.9e-18 PFAM
low complexity region 83 94 N/A INTRINSIC
low complexity region 123 145 N/A INTRINSIC
low complexity region 308 314 N/A INTRINSIC
low complexity region 350 367 N/A INTRINSIC
low complexity region 434 447 N/A INTRINSIC
low complexity region 517 553 N/A INTRINSIC
low complexity region 557 573 N/A INTRINSIC
SCOP:d1f5na1 631 739 7e-3 SMART
Pfam:INCENP_ARK-bind 789 846 1.5e-22 PFAM
Meta Mutation Damage Score 0.0869 question?
Coding Region Coverage
  • 1x: 89.7%
  • 3x: 78.3%
Het Detection Efficiency 55.9%
Validation Efficiency 83% (206/248)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] In mammalian cells, 2 broad groups of centromere-interacting proteins have been described: constitutively binding centromere proteins and 'passenger,' or transiently interacting, proteins (reviewed by Choo, 1997). The constitutive proteins include CENPA (centromere protein A; MIM 117139), CENPB (MIM 117140), CENPC1 (MIM 117141), and CENPD (MIM 117142). The term 'passenger proteins' encompasses a broad collection of proteins that localize to the centromere during specific stages of the cell cycle (Earnshaw and Mackay, 1994 [PubMed 8088460]). These include CENPE (MIM 117143); MCAK (MIM 604538); KID (MIM 603213); cytoplasmic dynein (e.g., MIM 600112); CliPs (e.g., MIM 179838); and CENPF/mitosin (MIM 600236). The inner centromere proteins (INCENPs) (Earnshaw and Cooke, 1991 [PubMed 1860899]), the initial members of the passenger protein group, display a broad localization along chromosomes in the early stages of mitosis but gradually become concentrated at centromeres as the cell cycle progresses into mid-metaphase. During telophase, the proteins are located within the midbody in the intercellular bridge, where they are discarded after cytokinesis (Cutts et al., 1999 [PubMed 10369859]).[supplied by OMIM, Mar 2008]
PHENOTYPE: Homozygous mutant embryos die before E8.5. Embryonic cells exhibit abnormal nuclei and abberent mitosis. [provided by MGI curators]
Allele List at MGI

All alleles(12) : Targeted, knock-out(1) Targeted, other(2) Gene trapped(9)

Other mutations in this stock
Total: 15 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Dnmt1 G A 9: 20,907,968 probably benign Het
Eno1 A G 4: 150,245,112 probably benign Het
Ercc8 G A 13: 108,160,723 G56R probably damaging Homo
Gm8773 C T 5: 5,574,060 probably benign Homo
Idh1 A G 1: 65,165,098 probably null Homo
Olfr1155 G A 2: 87,943,598 S10F probably benign Het
Olfr181 A T 16: 58,926,526 I15K probably benign Homo
Pdk2 T C 11: 95,032,498 D100G possibly damaging Homo
Prss56 T C 1: 87,187,170 L465P probably benign Homo
Slc10a3 G A X: 74,369,539 P416L probably damaging Homo
Syne2 C A 12: 75,929,790 T1243K probably benign Het
Vwf T C 6: 125,642,984 Y1542H probably damaging Homo
Zc3h13 G A 14: 75,316,039 R302Q probably damaging Het
Zfhx4 G T 3: 5,403,175 G2798W probably damaging Homo
Zfp667 A G 7: 6,290,545 T15A probably damaging Het
Other mutations in Incenp
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL01324:Incenp APN 19 9883728 missense unknown
IGL01717:Incenp APN 19 9893265 splice site probably benign
IGL02485:Incenp APN 19 9893368 missense unknown
IGL02488:Incenp APN 19 9893407 missense unknown
R0060:Incenp UTSW 19 9885459 splice site probably benign
R0164:Incenp UTSW 19 9894879 missense probably benign 0.23
R0164:Incenp UTSW 19 9894879 missense probably benign 0.23
R0242:Incenp UTSW 19 9893750 missense unknown
R0242:Incenp UTSW 19 9893750 missense unknown
R0284:Incenp UTSW 19 9893993 missense unknown
R1264:Incenp UTSW 19 9884015 missense unknown
R1432:Incenp UTSW 19 9885526 missense unknown
R1679:Incenp UTSW 19 9895414 missense unknown
R1827:Incenp UTSW 19 9872729 missense possibly damaging 0.94
R1970:Incenp UTSW 19 9885487 missense unknown
R3082:Incenp UTSW 19 9883779 missense unknown
R3083:Incenp UTSW 19 9883779 missense unknown
R4062:Incenp UTSW 19 9883778 missense unknown
R4063:Incenp UTSW 19 9883778 missense unknown
R4534:Incenp UTSW 19 9883939 missense unknown
R4535:Incenp UTSW 19 9883939 missense unknown
R4536:Incenp UTSW 19 9883939 missense unknown
R4709:Incenp UTSW 19 9876600 missense unknown
R4785:Incenp UTSW 19 9877690 missense unknown
R4785:Incenp UTSW 19 9877691 missense unknown
R5179:Incenp UTSW 19 9894909 missense unknown
R5282:Incenp UTSW 19 9878406 missense unknown
R5400:Incenp UTSW 19 9877675 critical splice donor site probably null
R5502:Incenp UTSW 19 9893364 missense unknown
R5608:Incenp UTSW 19 9893868 small insertion probably benign
R6033:Incenp UTSW 19 9872697 missense probably damaging 0.99
R6033:Incenp UTSW 19 9872697 missense probably damaging 0.99
R6807:Incenp UTSW 19 9877756 missense unknown
R6885:Incenp UTSW 19 9875132 missense unknown
R6959:Incenp UTSW 19 9876770 missense unknown
R7033:Incenp UTSW 19 9893372 missense unknown
R8258:Incenp UTSW 19 9893629 missense unknown
R8258:Incenp UTSW 19 9893641 missense unknown
R8259:Incenp UTSW 19 9893629 missense unknown
R8259:Incenp UTSW 19 9893641 missense unknown
R8293:Incenp UTSW 19 9875133 nonsense probably null
R9005:Incenp UTSW 19 9877724 nonsense probably null
Z1176:Incenp UTSW 19 9877687 missense unknown
Z1177:Incenp UTSW 19 9899364 start gained probably benign
Nature of Mutation

DNA sequencing using the SOLiD technique identified a C to T transition at position 652 of the Incenp transcript, in exon 4 of 18 total exons (NM_016692).  Two transcripts are annotated in the Ensembl database.  The mutation causes a threonine to isoleucine change at amino acid 149 of the encoded protein.  The mutation has been confirmed by DNA sequencing using the Sanger method (see trace files for B5639).

Protein Function and Prediction

The 880 amino acid inner centromere protein (Incenp) is a component of the chromosomal passenger complex (CPC) that acts as a regulator of mitosis (Uniprot Q9WU62).  The CPC complex has essential functions at the centromere in ensuring correct chromosome alignment and segregation, and is required for chromatin-induced microtubule stabilization and spindle assembly.  Incenp probably acts through association with AURKB or AURKC, and may bind directly to microtubules.  It controls the kinetochore localization of BUB1.  Incenp is reported to be alternatively spliced into two isoforms yielding two different protein products.


The mutated threonine bears similarity to a phosphorylation site.  The effect of the mutation cannot be predicted by the PolyPhen-2 program.

Posted On 2010-11-23