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Mismatch Repair

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...

Genetic Variation

Genetic Variation

Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles, which...

Point and Frameshift Mutations

Point and Frameshift Mutations

Point mutations are genetic alterations involving the change of a single nucleotide base pair in DNA. Depending on how the alteration affects protein synthesis, they can lead to various consequences.Point mutations fall into the following types:Silent mutations occur when a nucleotide change does not alter the amino acid sequence due to the redundancy of the genetic code. For instance, changing ACC to ACA still encodes threonine, leaving the protein function unaffected. This occurs because...

Mutations

Mutations

Mutations

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...

Mutations

Mutations

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Related Experiment Video

Updated: May 23, 2026

Employing Digital Droplet PCR to Detect BRAF V600E Mutations in Formalin-fixed Paraffin-embedded Reference Standard Cell Lines

Employing Digital Droplet PCR to Detect BRAF V600E Mutations in Formalin-fixed Paraffin-embedded Reference Standard Cell Lines

Published on: October 8, 2015

BRAF mutation: supporting diversity in HCL.

¹M D Anderson Cancer Center.

|April 12, 2012

Summary

This summary is machine-generated.

Researchers investigated v-raf murine sarcoma viral oncogene homolog B1 (BRAF) mutations in hairy cell leukemia (HCL). BRAF V600E mutations were not found in variant HCL but were present in some classic HCL cases.

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Area of Science:

Hematology
Oncology
Molecular Biology

Background:

Hairy cell leukemia (HCL) is a rare B-cell malignancy.
Understanding the molecular drivers of HCL subtypes is crucial for diagnosis and treatment.

Discussion:

This research investigates the prevalence of BRAF mutations across different HCL classifications.
The findings highlight significant differences in BRAF V600E mutation status between classic HCL (HCLc) and its variants.

Key Insights:

BRAF V600E mutations are consistently absent in all reported variant HCL forms.
A subset of classic HCL (HCLc) cases harbors the BRAF V600E mutation, suggesting potential therapeutic implications.

Outlook:

Further research is warranted to explore the clinical significance of BRAF mutations in HCL subtypes.
Identifying BRAF mutation status may aid in refining diagnostic criteria and guiding targeted therapy selection for HCL patients.