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  2. Sickle cell disease - Wikipedia

    en.wikipedia.org/wiki/Sickle_cell_disease

    Sickle cell disease (SCD), also simply called sickle cell, is a group of hemoglobin-related blood disorders typically inherited. [2] The most common type is known as sickle cell anemia. [2] It results in an abnormality in the oxygen-carrying protein haemoglobin found in red blood cells. [2] This leads to a rigid, sickle -like shape under ...

  3. Point mutation - Wikipedia

    en.wikipedia.org/wiki/Point_mutation

    Sickle-cell anemia is an autosomal recessive disorder that affects 1 in 500 African Americans, and is one of the most common blood disorders in the United States. [17] The single replacement of the sixth amino acid in the beta-globin, glutamic acid, with valine results in deformed red blood cells. These sickle-shaped cells cannot carry nearly ...

  4. Missense mutation - Wikipedia

    en.wikipedia.org/wiki/Missense_mutation

    Missense mutation refers to a change in one amino acid in a protein, arising from a point mutation in a single nucleotide. Missense mutation is a type of nonsynonymous substitution in a DNA sequence. Two other types of nonsynonymous substitution are the nonsense mutations, in which a codon is changed to a premature stop codon that results in ...

  5. Sickle cell trait - Wikipedia

    en.wikipedia.org/wiki/Sickle_cell_trait

    Hematology. Sickle cell trait describes a condition in which a person has one abnormal allele of the hemoglobin beta gene (is heterozygous), but does not display the severe symptoms of sickle cell disease that occur in a person who has two copies of that allele (is homozygous). Those who are heterozygous for the sickle cell allele produce both ...

  6. Allele-specific oligonucleotide - Wikipedia

    en.wikipedia.org/wiki/Allele-specific_oligo...

    The human disease sickle cell anemia is caused by a genetic mutation in the codon for the sixth amino acid of the blood protein beta-hemoglobin.The normal DNA sequence G-A-G codes for the amino acid glutamate, while the mutation changes the middle adenine to a thymine, leading to the sequence G-T-G (G-U-G in the mRNA).

  7. Amino acid replacement - Wikipedia

    en.wikipedia.org/wiki/Amino_acid_replacement

    Amino acid replacement. Amino acid replacement is a change from one amino acid to a different amino acid in a protein due to point mutation in the corresponding DNA sequence. It is caused by nonsynonymous missense mutation which changes the codon sequence to code other amino acid instead of the original. Notable mutations.

  8. Hemoglobin C - Wikipedia

    en.wikipedia.org/wiki/Hemoglobin_C

    Hemoglobin C (abbreviated as HbC) is an abnormal hemoglobin in which glutamic acid residue at the 6th position of the β-globin chain is replaced with a lysine residue due to a point mutation in the HBB gene. [1] People with one copy of the gene for hemoglobin C do not experience symptoms, but can pass the abnormal gene on to their children.

  9. Endonuclease - Wikipedia

    en.wikipedia.org/wiki/Endonuclease

    Patients with mutations are unable to repair DNA damage caused by sunlight. [26] Sickle Cell anemia is a disease caused by a point mutation. The sequence altered by the mutation eliminates the recognition site for the restriction endonuclease MstII that recognizes the nucleotide sequence. [27]