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Tight Association of DNA Polymerase Alpha With Granular Structures in the Nuclear Matrix of Chick Embryo Cell: Immunocytochemical Detection With Monoclonal Antibody Against DNA Polymerase Alpha

Tight Association of DNA Polymerase Alpha With Granular Structures in the Nuclear Matrix of Chick Embryo Cell: Immunocytochemical Detection With Monoclonal Antibody Against DNA Polymerase Alpha

S Yamamoto, T Takahashi, A Matsukage

Cell Struct Funct. 1984 Mar;9(1):83-90.

PMID: 6233015

Abstract:

Immunofluorescent methods using a monoclonal antibody against chick DNA polymerase alpha and a rabbit antibody against chick DNA polymerase beta demonstrated that both DNA polymerases alpha and beta are present mainly in nuclei of cultured chick embryo cells. Fluorescence produced by anti-DNA polymerase alpha was more intense in the small granules than in other parts of the nucleus but, fluorescence produced by anti-DNA polymerase beta was distributed evenly in the nucleus. Cells first were treated with Nonidet P-40, followed by treatment with 50 micrograms/ml pancreatic DNase and 2 M NaCl in order to prepare the nuclear matrix. Fluorescence produced by anti-DNA polymerase alpha was still detectable in the granules after these treatments, but most of the fluorescence produced by anti-DNA polymerase beta disappeared. Our results indicate that a part of DNA polymerase alpha is tightly bound to a special structure present in the nuclear matrix which presumably is the DNA replication machinery.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR42417426	Anti-phospho-Casein Kinase II α (pTyr255) antibody produced in rabbit			Price

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