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Updated: Jun 4, 2026

Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
Published on: May 3, 2018
What's the hype about CDK5RAP2?
Nadine Kraemer1, Lina Issa, Stefanie C R Hauck
1Department of Pediatric Neurology, Charité, Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany.
Abstract:
Cyclin dependent kinase 5 regulatory subunit-associated protein 2 (CDK5RAP2) has gained attention in the last years following the discovery, in 2005, that recessive mutations cause primary autosomal recessive microcephaly. This disease is seen as an isolated developmental defect of the brain, particularly of the cerebral cortex, and was thus historically also referred to as microcephalia vera. Unraveling the pathomechanisms leading to this human disease is fascinating scientists because it can convey insight into basic mechanisms of physiologic brain development (particularly of cortex formation). It also finds itself in the spotlight because of its implication in trends in mammalian evolution with a massive increase in the size of the cerebral cortex in primates. Here, we provide a timely overview of the current knowledge on the function of CDK5RAP2 and mechanisms that might lead to disease in humans when the function of this protein is disturbed.
Insights
Mutations in Cyclin dependent kinase 5 regulatory subunit-associated protein 2 (CDK5RAP2) cause primary autosomal recessive microcephaly, a brain developmental defect. Understanding CDK5RAP2 function offers insights into brain development and evolution.
Area of Science:
- Neuroscience
- Developmental Biology
- Genetics
Background:
- Cyclin dependent kinase 5 regulatory subunit-associated protein 2 (CDK5RAP2) mutations cause primary autosomal recessive microcephaly.
- This condition is an isolated brain developmental defect, primarily affecting the cerebral cortex.
- CDK5RAP2's role is crucial for understanding human brain development and evolution, especially cortical expansion in primates.
Purpose of the Study:
- To provide an overview of CDK5RAP2 functions.
- To explore the mechanisms underlying human diseases caused by CDK5RAP2 dysfunction.
- To connect CDK5RAP2's role to broader concepts in brain development and evolution.
Main Methods:
- Literature review of studies on CDK5RAP2.
- Analysis of genetic data related to microcephaly.
- Synthesis of current knowledge on protein function and disease mechanisms.
Main Results:
- CDK5RAP2 is essential for normal brain development, particularly cerebral cortex formation.
- Recessive mutations in CDK5RAP2 lead to primary autosomal recessive microcephaly.
- The protein's function is implicated in the evolutionary increase of cerebral cortex size in mammals.
Conclusions:
- CDK5RAP2 plays a critical role in human brain development.
- Understanding CDK5RAP2 dysfunction illuminates the pathogenesis of microcephaly.
- Research on CDK5RAP2 contributes to understanding cortical evolution.
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