This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
4bna
From Proteopedia
| Line 1: | Line 1: | ||
| - | [[Image:4bna.gif|left|200px]] | + | [[Image:4bna.gif|left|200px]] |
| - | + | ||
| - | '''REVERSIBLE BENDING AND HELIX GEOMETRY IN A B-DNA DODECAMER: CGCGAATTBRCGCG''' | + | {{Structure |
| + | |PDB= 4bna |SIZE=350|CAPTION= <scene name='initialview01'>4bna</scene>, resolution 2.300Å | ||
| + | |SITE= | ||
| + | |LIGAND= | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''REVERSIBLE BENDING AND HELIX GEOMETRY IN A B-DNA DODECAMER: CGCGAATTBRCGCG''' | ||
| + | |||
==Overview== | ==Overview== | ||
| Line 7: | Line 16: | ||
==About this Structure== | ==About this Structure== | ||
| - | 4BNA is a [ | + | 4BNA is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/ ]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4BNA OCA]. |
==Reference== | ==Reference== | ||
| - | Reversible bending and helix geometry in a B-DNA dodecamer: CGCGAATTBrCGCG., Fratini AV, Kopka ML, Drew HR, Dickerson RE, J Biol Chem. 1982 Dec 25;257(24):14686-707. PMID:[http:// | + | Reversible bending and helix geometry in a B-DNA dodecamer: CGCGAATTBrCGCG., Fratini AV, Kopka ML, Drew HR, Dickerson RE, J Biol Chem. 1982 Dec 25;257(24):14686-707. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7174662 7174662] |
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
[[Category: Dickerson, R E.]] | [[Category: Dickerson, R E.]] | ||
| Line 19: | Line 28: | ||
[[Category: modified]] | [[Category: modified]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 19:09:04 2008'' |
Revision as of 17:09, 20 March 2008
| |||||||
| , resolution 2.300Å | |||||||
|---|---|---|---|---|---|---|---|
| Coordinates: | save as pdb, mmCIF, xml | ||||||
REVERSIBLE BENDING AND HELIX GEOMETRY IN A B-DNA DODECAMER: CGCGAATTBRCGCG
Overview
A double-helical B-DNA dodecamer has been analyzed by single crystal x-ray diffraction methods and refined independently in four variants: sequence CGCGAATTCGCG at 20 degrees C and at 16 K, and CGCGAATTBrCGCG in 60% methylpentanediol at 20 and at 7 degrees C. The first three forms show a 14-19 degrees bend in overall helix axis, but the fourth is straight and unbent. Detailed comparisons of the various forms have led to a better understanding of helix geometry and bending. Structural principles can be understood best if organized under four headings: 1) intrinsic geometry of the sugar rings, 2) stacking and relative motion of base pairs, 3) geometry of the connecting phosphate backbone, and 4) mechanics of bending in B-DNA. The observed bending is neither completely localized nor smooth and continuous, but an intermediate compromise that can be termed "annealed kinking."
About this Structure
4BNA is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.
Reference
Reversible bending and helix geometry in a B-DNA dodecamer: CGCGAATTBrCGCG., Fratini AV, Kopka ML, Drew HR, Dickerson RE, J Biol Chem. 1982 Dec 25;257(24):14686-707. PMID:7174662
Page seeded by OCA on Thu Mar 20 19:09:04 2008
