The nucleus of either the ovum or the spermatozoon following fertilization. Thus, in the fertilized ovum, there are two pronuclei, one originating from the ovum, the other from the spermatozoon that brought about fertilization; they approach each other, but do not fuse until just before the first cleavage, when each pronucleus loses its membrane to release its contents. (Gene Ontology, GO_0045120)
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18 proteins localized to the pronucleus cellular component from the COMPARTMENTS Curated Protein Localization Evidence Scores dataset.
