Rearrangements of pterinosomes and cytoskeleton accompanying pigment dispersion in goldfish xanthophores.

R. E. Palazzo*, T. J. Lynch, S. J. Lo, J. D. Taylor, T. T. Tchen

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

13 Scopus citations


The cytoskeleton of goldfish xanthophores contains an abundance of unique dense structures (400 nm in diameter) that are absent in goldfish nonpigment cells and are probably remnants of pterinosomes. No major difference in protein composition between xanthophores and nonpigment cells (without these structures) was found that could account for these structures. In xanthophores, these structures are foci of radiating filaments. The addition or withdrawal of ACTH causes a radical rearrangement of the xanthophore cytoskeleton accompanying redistribution of carotenoid droplets, namely, the virtual exclusion of these dense bodies with associated filaments from the space occupied by the carotenoid droplet aggregate vs. a relatively even cytoplasmic distribution of these structures when the carotenoid droplets are dispersed. These changes in cytoskeletal morphology are not accompanied by any major changes in the protein or phosphoprotein composition of the cytoskeleton.

Original languageEnglish
Pages (from-to)9-20
Number of pages12
JournalCell motility and the cytoskeleton
Issue number1
StatePublished - 1989
Externally publishedYes


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