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Literature DB >> 4504370

Structures of the visual chromophores and related pigments: a conformational basis of visual excitation.

Abstract

A detailed conformational analysis of the known crystal structures of vitamin A, carotenoid, and xanthenoid derivatives has been made. These studies suggest that the visual chromophore 11-cis retinal and its isomers may each occur in several different conformational states, which would be expected to have different lightabsorbing characteristics. The presence of such states for 11-cis retinal and all-trans retinal may contribute to the observed rhodopsin intermediates that have been characterized by different lambda(max) values, and to the breadth of spectral response in scotopic and color vision.

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Year: 1972 PMID： 4504370 PMCID： PMC426750 DOI： 10.1073/pnas.69.6.1569

Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205

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References

23 in total

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Authors: R G MATTHEWS; R HUBBARD; P K BROWN; G WALD
Journal: J Gen Physiol Date: 1963-11 Impact factor: 4.086

2. THE ACTION OF LIGHT ON RHODOPSIN.

Authors: R Hubbard; A Kropf
Journal: Proc Natl Acad Sci U S A Date: 1958-02 Impact factor: 11.205

3. The structure of carboxypeptidase A. 8. Atomic interpretation at 0.2 nm resolution, a new study of the complex of glycyl-L-tyrosine with CPA, and mechanistic deductions.

Authors: W N Lipscomb; G N Reeke; J A Hartsuck; F A Quiocho; P H Bethge
Journal: Philos Trans R Soc Lond B Biol Sci Date: 1970-02-12 Impact factor: 6.237

Structures of the visual chromophores and related pigments: a conformational basis of visual excitation.

1. TAUTOMERIC FORMS OF METARHODOPSIN.

2. THE ACTION OF LIGHT ON RHODOPSIN.

3. The structure of carboxypeptidase A. 8. Atomic interpretation at 0.2 nm resolution, a new study of the complex of glycyl-L-tyrosine with CPA, and mechanistic deductions.

4. Crystallographic studies of the activity of hen egg-white lysozyme.

5. Implications of torsional potential of retinal isomers for visual excitation.

6. Linkage of retinal to opsin and absence of phospholipids in purified frog visual pigment 500.

7. Ring orientation in -ionone and retinals.

8. The crystal and molecular structure of canthaxanthin.

9. Location of the heme in horse heart ferricytochrome c by x-ray diffraction.

10. THE ROLE OF CARBONIUM IONS IN COLOR RECEPTION.