Theoretical studies on protein-nucleic acid interactions. I. Interaction of positively charged amino acids with nucleic acid fragments

Biopolymers ◽  
1984 ◽  
Vol 23 (10) ◽  
pp. 1979-1993 ◽  
Author(s):  
N. Vasant Kumar ◽  
Girjesh Govil
Keyword(s):  
Amino Acids ◽  
Nucleic Acid ◽  
Theoretical Studies ◽  
Charged Amino Acids ◽  
Protein Nucleic Acid ◽  
Nucleic Acid Interactions ◽  
Positively Charged

Snapshot blotting: The transfer of nucleic acids and nucleoprotein complexes from electrophoresis gels to EM grids

1992 ◽  
Vol 50 (1) ◽  
pp. 762-763
Author(s):  
Stephen D. Jett
Keyword(s):  
Nucleic Acid ◽  
Nucleic Acids ◽  
Nucleic Acid Binding ◽  
Mobility Shift ◽  
Carbon Coated ◽  
Nucleoprotein Complexes ◽  
Mobility Shift Assay ◽  
Protein Nucleic Acid ◽  
Gel Mobility Shift ◽  
Nucleic Acid Interactions

The electrophoresis gel mobility shift assay is a popular method for the study of protein-nucleic acid interactions. The binding of proteins to DNA is characterized by a reduction in the electrophoretic mobility of the nucleic acid. Binding affinity, stoichiometry, and kinetics can be obtained from such assays; however, it is often desirable to image the various species in the gel bands using TEM. Present methods for isolation of nucleoproteins from gel bands are inefficient and often destroy the native structure of the complexes. We have developed a technique, called “snapshot blotting,” by which nucleic acids and nucleoprotein complexes in electrophoresis gels can be electrophoretically transferred directly onto carbon-coated grids for TEM imaging.

scholarly journals The Superagonistic Activity of Bovine Thyroid-stimulating Hormone (TSH) and the Human TR1401 TSH Analog Is Determined by Specific Amino Acids in the Hinge Region of the Human TSH Receptor

2009 ◽  
Vol 284 (24) ◽  
pp. 16317-16324 ◽  
Author(s):  
Sandra Mueller ◽  
Gunnar Kleinau ◽  
Mariusz W. Szkudlinski ◽  
Holger Jaeschke ◽  
Gerd Krause ◽  
...  
Keyword(s):  
Amino Acids ◽  
Thyroid Stimulating Hormone ◽  
Hinge Region ◽  
Camp Production ◽  
Glycoprotein Hormone ◽  
Charged Amino Acids ◽  
Bovine Thyroid ◽  
Positively Charged ◽  
Bovine Tsh ◽  
Signaling Activity

Bovine TSH (bTSH) has a higher affinity to the human TSHR (hTSHR) and a higher signaling activity than human TSH (hTSH). The molecular reasons for these phenomena are unknown. Distinct negatively charged residues (Glu297, Glu303, and Asp382) in the hinge region of the hTSHR are known to be important for bTSH binding and signaling. To investigate the potential relevance of these positions for differences between bTSH and hTSH in the interaction to the hTSHR, we determined bTSH- and hTSH-mediated cAMP production of several substitutions at these three hinge residues. To examine specific variations of hTSH, we also investigated the superagonistic hTSH analog TR1401 (TR1401), whose sequence differs from hTSH by four additional positively charged amino acids that are also present in bTSH. To characterize possible interactions between the acidic hTSHR positions Glu297, Glu303, or Asp382 and the additional basic residues of TR1401, we investigated TR1401 binding and signaling properties. Our data reveal increased cAMP signaling of the hTSHR using TR1401 and bTSH compared with hTSH. Whereas Asp382 seems to be important for bTSH- and TR1401-mediated but not for hTSH-mediated signaling, the substitution E297K exhibits a decreased signaling for all three TSH variants. Interestingly, bTSH and TR1401 showed only a slightly different binding pattern. These observations imply that specific residues of the hinge region are mediators of the superagonistic activity of bTSH and TR1401 in contrast to hTSH. Moreover, the simultaneous localization of binding components in the glycoprotein hormone molecule and the receptor hinge region permits important reevaluation of interacting hormone receptor domains.

Use of difference boundary sedimentation velocity to investigate nonspecific protein-nucleic acid interactions

Biochemistry ◽  
1980 ◽  
Vol 19 (15) ◽  
pp. 3516-3522 ◽  
Author(s):  
Timothy M. Lohman ◽  
C. Glen Wensley ◽  
Jeffrey Cina ◽  
Richard R. Burgess ◽  
M. Thomas Record
Keyword(s):  
Nucleic Acid ◽  
Sedimentation Velocity ◽  
Protein Nucleic Acid ◽  
Nucleic Acid Interactions

Protein—nucleic acid interactions Folding and binding Web alert

1998 ◽  
Vol 8 (1) ◽  
pp. 9-10 ◽  
Author(s):  
PhilipE Bourne ◽  
Judith Murray-Rust ◽  
JeremyH Lakey
Keyword(s):  
Nucleic Acid ◽  
Protein Nucleic Acid ◽  
Nucleic Acid Interactions

Nonspecific Prion Protein–Nucleic Acid Interactions Lead to Different Aggregates and Cytotoxic Species

Biochemistry ◽  
2012 ◽  
Vol 51 (27) ◽  
pp. 5402-5413 ◽  
Author(s):  
Bruno Macedo ◽  
Thiago A. Millen ◽  
Carolina A. C. A. Braga ◽  
Mariana P. B. Gomes ◽  
Priscila S. Ferreira ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Prion Protein ◽  
Protein Nucleic Acid ◽  
Nucleic Acid Interactions
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