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Mutations in the Chromatin Regulator Gene BRPF1 Cause Syndromic Intellectual Disability and Deficient Histone Acetylation.

Abstract：

:Identification of over 500 epigenetic regulators in humans raises an interesting question regarding how chromatin dysregulation contributes to different diseases. Bromodomain and PHD finger-containing protein 1 (BRPF1) is a multivalent chromatin regulator possessing three histone-binding domains, one non-specific DNA-binding module, and several motifs for interacting with and activating three lysine acetyltransferases. Genetic analyses of fish brpf1 and mouse Brpf1 have uncovered an important role in skeletal, hematopoietic, and brain development, but it remains unclear how BRPF1 is linked to human development and disease. Here, we describe an intellectual disability disorder in ten individuals with inherited or de novo monoallelic BRPF1 mutations. Symptoms include infantile hypotonia, global developmental delay, intellectual disability, expressive language impairment, and facial dysmorphisms. Central nervous system and spinal abnormalities are also seen in some individuals. These clinical features overlap with but are not identical to those reported for persons with KAT6A or KAT6B mutations, suggesting that BRPF1 targets these two acetyltransferases and additional partners in humans. Functional assays showed that the resulting BRPF1 variants are pathogenic and impair acetylation of histone H3 at lysine 23, an abundant but poorly characterized epigenetic mark. We also found a similar deficiency in different lines of Brpf1-knockout mice. These data indicate that aberrations in the chromatin regulator gene BRPF1 cause histone H3 acetylation deficiency and a previously unrecognized intellectual disability syndrome.

journal_name

Am J Hum Genet

journal_title

American journal of human genetics

authors

Yan K,Rousseau J,Littlejohn RO,Kiss C,Lehman A,Rosenfeld JA,Stumpel CTR,Stegmann APA,Robak L,Scaglia F,Nguyen TTM,Fu H,Ajeawung NF,Camurri MV,Li L,Gardham A,Panis B,Almannai M,Sacoto MJG,Baskin B,Ruivenkamp C,Xi

doi

10.1016/j.ajhg.2016.11.011

subject

Has Abstract

pub_date

2017-01-05 00:00:00

pages

91-104

issue

eissn

0002-9297

issn

1537-6605

pii

S0002-9297(16)30489-X

journal_volume

100

pub_type

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Mutations in the Chromatin Regulator Gene BRPF1 Cause Syndromic Intellectual Disability and Deficient Histone Acetylation.