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Neuron. 1994 May;12(5):1131-8.

Molecular determinants of human red/green color discrimination.

Author information

1
Graduate Department of Biochemistry, Brandeis University, Waltham, Massachusetts 02254.

Abstract

The human red and green color vision pigments are identical at all but 15 of their 364 amino acids, and yet their absorption maxima differ by 31 nm. In an extensive mutagenesis study, including a set of 28 chimeric proteins modeled after pigments in the color-deficient human population and an additional 30 single and multiple point mutants, the spectral difference between these 2 pigments is shown to be determined by 7 and only 7 amino acid residues. In going from the red pigment to the green pigment, the 7 residues are Ser116-->Tyr, Ser180-->Ala, Ile230-->Thr, Ala233-->Ser, Tyr277-->Phe, Thr285-->Ala, and Tyr309-->Phe.

PMID:
8185948
DOI:
10.1016/0896-6273(94)90320-4
[Indexed for MEDLINE]

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