Incidental Mutation 'D605:Kat2b'
ID 570
Institutional Source Beutler Lab
Gene Symbol Kat2b
Ensembl Gene ENSMUSG00000000708
Gene Name K(lysine) acetyltransferase 2B
Synonyms A930006P13Rik, Pcaf
Accession Numbers
Essential gene? Non essential (E-score: 0.000) question?
Stock # D605 (G1)
Quality Score
Status Validated
Chromosome 17
Chromosomal Location 53873889-53979748 bp(+) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to G at 53936358 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Arginine to Glycine at position 99 (R99G)
Ref Sequence ENSEMBL: ENSMUSP00000127659 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000000724] [ENSMUST00000164390]
AlphaFold Q9JHD1
Predicted Effect probably damaging
Transcript: ENSMUST00000000724
AA Change: R177G

PolyPhen 2 Score 0.999 (Sensitivity: 0.14; Specificity: 0.99)
SMART Domains Protein: ENSMUSP00000000724
Gene: ENSMUSG00000000708
AA Change: R177G

DomainStartEndE-ValueType
low complexity region 4 21 N/A INTRINSIC
low complexity region 32 55 N/A INTRINSIC
Pfam:PCAF_N 56 308 6.2e-114 PFAM
low complexity region 461 472 N/A INTRINSIC
Pfam:Acetyltransf_7 522 605 1.5e-11 PFAM
Pfam:Acetyltransf_1 530 604 3.2e-11 PFAM
low complexity region 643 659 N/A INTRINSIC
BROMO 702 810 1.08e-44 SMART
Predicted Effect noncoding transcript
Transcript: ENSMUST00000163648
Predicted Effect probably damaging
Transcript: ENSMUST00000164390
AA Change: R99G

PolyPhen 2 Score 1.000 (Sensitivity: 0.00; Specificity: 1.00)
SMART Domains Protein: ENSMUSP00000127659
Gene: ENSMUSG00000000708
AA Change: R99G

DomainStartEndE-ValueType
Pfam:PCAF_N 1 210 6e-122 PFAM
Meta Mutation Damage Score 0.8320 question?
Coding Region Coverage
  • 1x: 75.6%
  • 3x: 45.1%
Het Detection Efficiency 20.0%
Validation Efficiency 89% (63/71)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] CBP and p300 are large nuclear proteins that bind to many sequence-specific factors involved in cell growth and/or differentiation, including c-jun and the adenoviral oncoprotein E1A. The protein encoded by this gene associates with p300/CBP. It has in vitro and in vivo binding activity with CBP and p300, and competes with E1A for binding sites in p300/CBP. It has histone acetyl transferase activity with core histones and nucleosome core particles, indicating that this protein plays a direct role in transcriptional regulation. [provided by RefSeq, Jul 2008]
PHENOTYPE: Mice homozygous for a null allele exhibit no abrnomal phenotype. [provided by MGI curators]
Allele List at MGI

All alleles(122) : Targeted, knock-out(2) Targeted, other(1) Gene trapped(119)

Other mutations in this stock
Total: 4 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
C2cd5 C T 6: 142,975,386 (GRCm39) V787I probably benign Het
Ly75 A G 2: 60,182,696 (GRCm39) probably null Het
Or5b118 T A 19: 13,448,521 (GRCm39) C62* probably null Het
Sfmbt2 C T 2: 10,584,136 (GRCm39) T864I probably benign Het
Other mutations in Kat2b
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00473:Kat2b APN 17 53,970,651 (GRCm39) missense possibly damaging 0.46
IGL00793:Kat2b APN 17 53,972,852 (GRCm39) missense probably benign 0.00
IGL01628:Kat2b APN 17 53,917,925 (GRCm39) missense possibly damaging 0.89
IGL02494:Kat2b APN 17 53,960,233 (GRCm39) missense probably damaging 1.00
IGL03347:Kat2b APN 17 53,931,379 (GRCm39) critical splice acceptor site probably null
cakewalk UTSW 17 53,945,550 (GRCm39) missense probably damaging 1.00
fracking UTSW 17 53,931,450 (GRCm39) missense probably damaging 1.00
R0060:Kat2b UTSW 17 53,961,571 (GRCm39) missense probably damaging 1.00
R0225:Kat2b UTSW 17 53,948,238 (GRCm39) missense probably damaging 1.00
R0372:Kat2b UTSW 17 53,945,565 (GRCm39) missense possibly damaging 0.95
R0638:Kat2b UTSW 17 53,951,771 (GRCm39) splice site probably benign
R0639:Kat2b UTSW 17 53,874,566 (GRCm39) missense probably benign 0.38
R0780:Kat2b UTSW 17 53,874,476 (GRCm39) missense unknown
R1240:Kat2b UTSW 17 53,931,425 (GRCm39) missense probably benign 0.00
R2346:Kat2b UTSW 17 53,917,932 (GRCm39) missense probably benign 0.07
R3402:Kat2b UTSW 17 53,972,881 (GRCm39) missense probably damaging 1.00
R3776:Kat2b UTSW 17 53,874,609 (GRCm39) splice site probably null
R4009:Kat2b UTSW 17 53,951,769 (GRCm39) splice site probably null
R4011:Kat2b UTSW 17 53,951,769 (GRCm39) splice site probably null
R4543:Kat2b UTSW 17 53,960,168 (GRCm39) missense probably benign
R4598:Kat2b UTSW 17 53,977,826 (GRCm39) missense probably benign 0.02
R4785:Kat2b UTSW 17 53,960,231 (GRCm39) missense possibly damaging 0.81
R5079:Kat2b UTSW 17 53,970,666 (GRCm39) missense probably damaging 1.00
R5475:Kat2b UTSW 17 53,970,609 (GRCm39) missense probably damaging 1.00
R6993:Kat2b UTSW 17 53,945,550 (GRCm39) missense probably damaging 1.00
R7047:Kat2b UTSW 17 53,970,597 (GRCm39) missense probably benign 0.01
R7058:Kat2b UTSW 17 53,972,894 (GRCm39) missense probably benign 0.00
R7199:Kat2b UTSW 17 53,977,706 (GRCm39) missense probably damaging 1.00
R7276:Kat2b UTSW 17 53,931,450 (GRCm39) missense probably damaging 1.00
R7418:Kat2b UTSW 17 53,917,953 (GRCm39) missense possibly damaging 0.94
R7535:Kat2b UTSW 17 53,931,431 (GRCm39) missense probably damaging 1.00
R7561:Kat2b UTSW 17 53,948,286 (GRCm39) missense probably benign 0.22
R7723:Kat2b UTSW 17 53,945,415 (GRCm39) missense possibly damaging 0.62
R7976:Kat2b UTSW 17 53,955,835 (GRCm39) missense probably benign 0.00
R8250:Kat2b UTSW 17 53,970,564 (GRCm39) missense probably damaging 1.00
R8277:Kat2b UTSW 17 53,948,281 (GRCm39) missense probably benign 0.01
R8969:Kat2b UTSW 17 53,967,116 (GRCm39) nonsense probably null
R9136:Kat2b UTSW 17 53,936,364 (GRCm39) missense probably benign 0.00
R9281:Kat2b UTSW 17 53,931,425 (GRCm39) missense probably benign 0.00
Nature of Mutation

DNA sequencing using the SOLiD technique identified an A to G transition at position 888 of the Kat2b transcript, in exon 5 of 19 total exons (NM_020005).  Two transcripts are annotated in the NCBI Gene database.  The mutation causes an arginine to glycine change at amino acid 177 of the encoded protein (NP_064389).  The mutation has been confirmed by DNA sequencing using the Sanger method (see trace file).

Protein Function and Prediction

Kat2b is an 813 amino acid histone acetyltransferase that functions to promote transcriptional activation (Uniprot Q9JHD1).  It has significant acetyltransferase activity for histones H3 and H4, and for nucleosome core particles.  Kat2b functions in a large chromatin remodeling complex.  It contains a catalytic N-acetyltransferase domain (aa 484-632) and a bromo domain (aa 721-791).  There is a second shorter protein isoform of Kat2b (NP_001177775).

The mutation is predicted to be probably damaging by the PolyPhen-2 program.

Posted On 2010-11-24