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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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SPG3A gene polymorphisms in hereditary spastic paraplegia.

Tian Li1,2, Li Tu2,3, Qian Zhang2

  • 1Zunyi Medical College Guizhou, China.

International Journal of Clinical and Experimental Pathology
|January 23, 2020
PubMed
Summary

This study analyzed the SPG3A gene in hereditary spastic paraplegia (HSP) patients, identifying polymorphisms in coding exons and introns. Understanding these genetic variations aids in HSP diagnosis and treatment.

Keywords:
Hereditary spastic paraplegiaSPG3Agenepolymorphism

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Area of Science:

  • Genetics
  • Neurology

Background:

  • Hereditary spastic paraplegia (HSP) is a group of inherited neurological disorders.
  • SPG3A gene mutations are a known cause of certain HSP types.

Purpose of the Study:

  • To analyze the genomic structure of the SPG3A gene in HSP patients.
  • To identify and compare SPG3A gene polymorphisms with healthy individuals.

Main Methods:

  • Sequencing of coding exons and junction regions of the SPG3A gene in 66 HSP patients.
  • DNA sequence alignment against 80 healthy control subjects.
  • Analysis of SPG3A gene polymorphisms.

Main Results:

  • The SPG3A gene comprises 14 coding exons.
  • Two polymorphisms were identified in exons 2 and 3.
  • Additional polymorphisms were found in exons 3, 4, and 6.

Conclusions:

  • The SPG3A gene exhibits polymorphic and conserved coding exons in normal subjects.
  • Three polymorphic coding sequences were found in the intron.
  • Knowledge of SPG3A polymorphisms and mutations can improve HSP diagnosis and treatment.