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CLP1
cleavage factor polyribonucleotide kinase subunit 1
The CLP1 gene provides instructions for making a protein involved in RNA processing and DNA repair, playing a vital role in proper nervous system development and function. The CLEAVAGE FACTOR POLYRIBONUCLEOTIDE KINASE SUBUNIT 1 (CLP1) gene is essential for producing the CLP1 protein.
CLP1 is located on the long (q) arm of chromosome 11, at band 11q12.1. Arm ratio per GRCh38 - banding schematic.
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Overview
The CLP1 gene, officially known as cleavage factor polyribonucleotide kinase subunit 1, encodes a protein instrumental in the metabolism of RNA molecules. Specifically, it functions as a polynucleotide kinase, an enzyme that adds phosphate groups to nucleic acids, which is a key step in RNA processing pathways.
Proper function of CLP1 is particularly important for the nervous system, with variations in the gene observed in individuals with certain neurological disorders. Its role in maintaining cellular health underscores its significance in human genetics.
What the gene does
The CLP1 protein serves as a polynucleotide kinase, an enzyme that catalyses the transfer of a phosphate group from ATP to the 5' hydroxyl terminus of nucleic acids. This enzymatic activity is crucial for a process called tRNA splicing, where non-coding introns are removed from precursor transfer RNA (tRNA) molecules, creating mature tRNAs essential for protein synthesis.
Beyond tRNA processing, CLP1 is also thought to be involved in the cellular response to DNA damage. This suggests a broader role in maintaining genomic stability and cellular integrity. Its kinase activity likely plays a part in signalling pathways that regulate cell growth and survival, particularly within the nervous system.
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Chromosome location
The CLP1 gene is located on chromosome 11 at position 11q12.1. This specific genomic address signifies its precise location within the human genome. The gene's position on chromosome 11 means it is found on the long arm of this chromosome, towards the centromere.
Protein structure
The CLP1 protein consists of 425 amino acids. Domain architecture has not been experimentally characterised in detail for this protein.
Key variants
Variations within the CLP1 gene can alter the protein's structure or function, potentially impacting its crucial roles in RNA processing and DNA repair. The inheritance pattern for conditions associated with CLP1 variants can vary.
Genetic changes in CLP1 may include single nucleotide substitutions, small insertions, or deletions. The specific clinical impact of a variant depends on its nature and location within the gene, affecting how severely it disrupts the CLP1 protein's activity.
Sample of pathogenic variants
1 pathogenic / likely-pathogenic variants from ClinVar, ranked by review status (expert-panel-reviewed first). This is a sample; recurrent founder variants in a specific population may not appear here - see the full ClinVar listing via the link above.
| Variant (HGVS) | Protein change | Classification | Evidence | Associated condition |
|---|---|---|---|---|
c.419G>A | p.Arg140His | Pathogenic/Likely pathogenic | ★★☆☆ | Pontocerebellar hypoplasia type 10 |
Evidence stars indicate ClinVar review status. Individual variant interpretation should always be performed by a qualified clinical laboratory - many variants remain classified as Variants of Uncertain Significance (VUS) pending more research.
Associated conditions
Variants in the CLP1 gene have been linked to a spectrum of neurological conditions. While not explicitly listed here, these typically involve progressive neurodegeneration affecting motor function and cognitive abilities. Because CLP1 is vital for tRNA maturation and possibly DNA repair, its dysfunction can lead to cellular stress, particularly in highly metabolically active cells like neurons.
The severity and presentation of these conditions can differ significantly among individuals, even with similar genetic variants, which highlights the complexity of genetic disorders.
No disease links recorded for this gene in our reference set.
UK clinical status
In the UK, the CLP1 gene is included on several NHS Genomic Medicine Service national panels for diagnostic testing. It is currently listed on panels for Ataxia and cerebellar anomalies, Cerebellar hypoplasia, Hereditary ataxia, Hereditary neuropathy or pain disorder, and Intellectual disability. This gene is also part of the DDG2P and Foetal anomalies (R21) panels.
Sources: NHS GMS PanelApp · Genomics England PanelApp · NHS National Genomic Test Directory
Frequently asked questions
What does the CLP1 gene do?
The CLP1 gene provides instructions for making the CLP1 protein, which acts as a polynucleotide kinase. This enzyme is crucial for preparing tRNA molecules for protein synthesis and may also be involved in the cellular response to DNA damage.
What happens if there are variants in the CLP1 gene?
Variants in the CLP1 gene can reduce or alter the function of the CLP1 protein. This can disrupt vital cellular processes like RNA processing, potentially leading to stress and dysfunction, particularly within the nervous system, and contributing to neurological conditions.
How is CLP1 relevant to neurological health?
CLP1 is essential for the proper function and development of the nervous system. Its role in tRNA maturation ensures efficient protein synthesis in neurons, and its potential role in DNA repair helps protect neural cells from damage. Dysfunction can therefore lead to neurological disorders.