Monomers through trimers of large tumor antigen bind in region I and monomers through tetramers bind in region II of simian virus 40 origin of replication DNA as stable structures in solution

Journal Article · Sat Jun 01 00:00:00 EDT 1985 · Proc. Natl. Acad. Sci. U.S.A.; (United States)

DOI:https://doi.org/10.1073/pnas.82.11.3626· OSTI ID:6114040

Mastrangelo, I A; Hough, P V.C.; Wilson, V G; Wall, J S; Hainfeld, J F; Tegtmeyer, P

Large tumor (T) antigen and its bound multimeric states are positioned by scanning transmission electron microscopy (STEM) within a few base pairs at control sequences of the simian virus 40 DNA origin of replication region. Proximal and distal edge positions for each multimer group match the end positions of previously mapped fragments protected from DNase cleavage. Since chance correspondence is shown to be extremely unlikely, STEM mass measurements, obtained concurrently with STEM map positions, indicate that the DNase fragments arise from bound monomers, dimers, trimers, and tetramers in binding region II and monomers, dimers, and trimers in binding region I. Simultaneous binding of seven monomer-equivalent masses is observed, three in region I and four in region II, with an ordered and interpretable mass distribution in the plane of the foil. Although this observation does not prove that the six G-A-G-G-C and one T-A-G-G-C sequences, similarly distributed, function as recognition sequences for T-antigen monomer, it provides strong support for such a model. The stable existence in solution of low- and intermediate-mass structures, observed at lower T-antigen concentrations, suggests a role as assembly intermediates.

• Research Organization: State Univ. of New York (SUNY), Stony Brook, NY (United States)
• OSTI ID: 6114040
• Journal Information: Proc. Natl. Acad. Sci. U.S.A.; (United States), Vol. 82:11
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
ANTIGENS
MASS DISTRIBUTION
SCANNING ELECTRON MICROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
SIMIAN VIRUS
DNA
DNA-ASE
DISTRIBUTION
ELECTRON MICROSCOPY
ENZYMES
ESTERASES
HYDROLASES
MICROORGANISMS
MICROSCOPY
NUCLEIC ACIDS
ORGANIC COMPOUNDS
PARASITES
PHOSPHODIESTERASES
SPATIAL DISTRIBUTION
VIRUSES
550200* - Biochemistry