Haem Disorder in Two Myoglobins: Comparison of Reorientation Rate

Overview

Journal Biochem J

Specialty Biochemistry

Date 1987 Sep 15

PMID 3689333

Citations 5

Authors

A Bellelli

R Foon

F Ascoli

M Brunori

Affiliations

Soon will be listed here.

Abstract

The globins from sperm whale and from Aplysia limacina myoglobins were reconstituted by addition of stoichiometric ferric protohaem and the Soret c.d. was followed as a function of time. For both reconstituted proteins, the Soret c.d. changes with time, reflecting haem reorientation inside its pocket, as previously described [Aojula, Wilson & Drake (1986) Biochem. J. 237, 613-616] for sperm whale myoglobin. The time course of the c.d. transition is found to be approx. 10 times faster in Aplysia than in sperm whale myoglobin, a result which is in agreement with the known structural and physicochemical properties of the two myoglobins; furthermore, these results confirm that c.d. and n.m.r. data on haem orientation in haemoproteins reflect the same molecular phenomenon.

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