{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,17]],"date-time":"2026-02-17T14:34:51Z","timestamp":1771338891773,"version":"3.50.1"},"reference-count":63,"publisher":"Canadian Science Publishing","issue":"3","license":[{"start":{"date-parts":[[2002,6,1]],"date-time":"2002-06-01T00:00:00Z","timestamp":1022889600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.nrcresearchpress.com\/page\/about\/CorporateTextAndDataMining"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biochem. Cell Biol."],"published-print":{"date-parts":[[2002,6,1]]},"abstract":"<jats:p> Protamine-like (PL) proteins are DNA-condensing proteins that replace somatic-type histones during spermatogenesis. Their composition suggests a function intermediate to that of histones and protamines. Although these proteins have been well characterized at the chemical level in a large number of species, particularly in marine invertebrates, little is known about the specific structures arising from their interaction with DNA. Speculation concerning chromatin structure is complicated by the high degree of heterogeneity in both the number and size of these proteins, which can vary considerably even between closely related species. After careful examination and comparison of the protein sequences available to date for the PL proteins, we propose a model for a novel chromatin structure in the sperm of these organisms that is mediated by somatic-type histones, which are frequently found associated with these proteins. This structure supports the concept that the PL proteins may represent various evolutionary steps between a sperm-specific histone H1 precursor and true protamines. Potential post-translational modifications and the control of PL protein expression and deposition are also discussed.Key words: protamine-like proteins, histones, chromatin structure, sperm, evolution. <\/jats:p>","DOI":"10.1139\/o02-083","type":"journal-article","created":{"date-parts":[[2002,7,27]],"date-time":"2002-07-27T10:58:36Z","timestamp":1027767516000},"page":"353-361","source":"Crossref","is-referenced-by-count":30,"title":["Protamine-like proteins: evidence for a novel chromatin structure"],"prefix":"10.1139","volume":"80","author":[{"given":"John D","family":"Lewis","sequence":"first","affiliation":[]},{"given":"Juan","family":"Ausi\u00f3","sequence":"additional","affiliation":[]}],"member":"155","reference":[{"key":"p_1\/p_1_1","unstructured":"Ausi\u00f3, J. 1980. Caracterizacion de las protaminas de los moluscos bivalvos. Mytilus edulis y Spisula solidissima y estudio de sus interacciones con el ADN. 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