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MCPH1
microcephalin 1
MCPH1 is located on the short (p) arm of chromosome 8, at band 8p23.1. Arm ratio per GRCh38 - banding schematic.
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Overview
MCPH1 (microcephalin 1) is situated on chromosome 8 and encodes a protein designated as microcephalin 1. The gene's official designation is HGNC:6954. Research into this gene continues to explore its role in human biology, though many details about protein function remain under active investigation. Sequence changes in MCPH1 display variable inheritance patterns depending on the specific variant. Understanding how different variants affect cellular processes requires careful clinical and laboratory study.
What the gene does
The precise cellular functions of the microcephalin 1 protein remain under investigation by the research community. While the protein has been studied in various contexts, comprehensive characterisation of its molecular roles continues. Current evidence suggests the protein may participate in cellular processes, though the exact mechanisms and pathways require further elucidation. As with many human proteins, understanding how microcephalin 1 operates at the molecular level demands ongoing experimental work. Future studies will likely clarify the specific biochemical activities and cellular contexts in which this protein functions.
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Chromosome location
MCPH1 is situated on the short arm of chromosome 8 at position 23.1, a region designated as 8p23.1 in standard cytogenetic nomenclature. This chromosomal location can be identified through standard genetic mapping techniques.
Protein structure
The detailed structural architecture of the microcephalin 1 protein has not been comprehensively characterised. Domain organisation and three-dimensional folding patterns remain areas for future structural biology research.
Key variants
Variants in MCPH1 encompass a spectrum of sequence changes, from single nucleotide substitutions to larger structural alterations. The inheritance pattern varies depending on the specific variant under consideration. Each variant requires individual assessment to determine its mode of transmission and potential clinical significance.
Sample of pathogenic variants
10 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.1625T>G | p.Leu542Ter | Pathogenic/Likely pathogenic | ★★☆☆ | Microcephaly 1, primary, autosomal recessive |
c.321del | p.Lys107fs | Pathogenic/Likely pathogenic | ★★☆☆ | Microcephaly 1, primary, autosomal recessive |
c.321dup | p.Arg108fs | Pathogenic | ★★☆☆ | Microcephaly 1, primary, autosomal recessive |
c.322-1G>C | - | Pathogenic/Likely pathogenic | ★★☆☆ | Microcephaly 1, primary, autosomal recessive |
c.571del | p.Ser191fs | Pathogenic/Likely pathogenic | ★★☆☆ | Microcephaly 1, primary, autosomal recessive |
c.595C>T | p.Gln199Ter | Pathogenic | ★★☆☆ | Autosomal recessive primary microcephaly |
c.698C>A | p.Ser233Ter | Pathogenic | ★★☆☆ | Autosomal recessive primary microcephaly |
c.733G>T | p.Gly245Ter | Pathogenic/Likely pathogenic | ★★☆☆ | Microcephaly 1, primary, autosomal recessive |
c.76_77del | p.Lys26fs | Pathogenic/Likely pathogenic | ★★☆☆ | Microcephaly 1, primary, autosomal recessive |
c.826_829del | p.Ser276fs | Pathogenic/Likely pathogenic | ★★☆☆ | Microcephaly 1, primary, autosomal recessive |
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
The relationship between MCPH1 variants and specific phenotypes continues to be characterised by clinical researchers. Because inheritance patterns vary by variant and the category of associated conditions remains unspecified in current databases, generalisations about clinical presentations require caution. Individual variants may show different patterns of association with developmental differences, and the full spectrum of phenotypic consequences is still being mapped through ongoing clinical studies.
No disease links recorded for this gene in our reference set.
UK clinical status
Information about MCPH1 in UK clinical genetics services would depend on the specific variant and clinical context under consideration. Healthcare providers can offer guidance based on individual circumstances.
Sources: NHS GMS PanelApp · Genomics England PanelApp · NHS National Genomic Test Directory
Diet & lifestyle considerations
No specific lifestyle recommendations are uniquely applicable to MCPH1 variants, as the relationship between this gene and particular phenotypes varies by variant. General population health guidance regarding balanced nutrition, regular physical activity, and routine medical care remains appropriate. Any specific health considerations should be discussed with a healthcare provider familiar with the individual's complete medical picture.
Supplement considerations
There is no conclusive evidence that any particular dietary supplement prevents or modifies conditions that may be associated with MCPH1 variants. The use of any supplement should be discussed with a healthcare provider, who can consider potential interactions with other medications and individual health status. Self-prescribing supplements without professional guidance is not recommended.
Frequently asked questions
What does the MCPH1 gene do?
MCPH1 encodes the microcephalin 1 protein. While research into this protein continues, many details about its precise cellular functions remain under investigation. The protein has been studied in various biological contexts, though comprehensive functional characterisation is ongoing.
How are MCPH1 variants inherited?
Inheritance patterns for MCPH1 variants vary depending on the specific sequence change. Different variants may show different modes of transmission. Determining how a particular variant is inherited requires assessment of family history and genetic analysis.
Where is the MCPH1 gene located?
MCPH1 is positioned on the short arm of chromosome 8 at position 23.1, designated as 8p23.1 in chromosomal nomenclature. This location is on chromosome 8, one of the 23 pairs of human chromosomes.