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.


1zgp

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Line 1: Line 1:
-
[[Image:1zgp.gif|left|200px]]
+
{{Seed}}
 +
[[Image:1zgp.png|left|200px]]
<!--
<!--
Line 9: Line 10:
{{STRUCTURE_1zgp| PDB=1zgp | SCENE= }}
{{STRUCTURE_1zgp| PDB=1zgp | SCENE= }}
-
'''Crystal Structure of the Discosoma Red Fluorescent Protein (DsRed) Variant K70M'''
+
===Crystal Structure of the Discosoma Red Fluorescent Protein (DsRed) Variant K70M===
-
==Overview==
+
<!--
-
The mature self-synthesizing p-hydroxybenzylideneimidazolinone-like fluorophores of Discosoma red fluorescent protein (DsRed) and Aequorea victoria green fluorescent protein (GFP) are extensively studied as powerful biological markers. Yet, the spontaneous formation of these fluorophores by cyclization, oxidation, and dehydration reactions of tripeptides within their protein environment remains incompletely understood. The mature DsRed fluorophore (Gln 66, Tyr 67, and Gly 68) differs from the GFP fluorophore by an acylimine that results in Gln 66 Calpha planar geometry and by a Phe 65-Gln 66 cis peptide bond. DsRed green-to-red maturation includes a green-fluorescing immature chromophore and requires a chromophore peptide bond trans-cis isomerization that is slow and incomplete. To clarify the unique structural chemistry for the individual immature "green" and mature "red" chromophores of DsRed, we report here the determination and analysis of crystal structures for the wild-type protein (1.4 A resolution), the entirely green DsRed K70M mutant protein (1.9 A resolution), and the DsRed designed mutant Q66M (1.9 A resolution), which shows increased red chromophore relative to the wild-type DsRed. Whereas the mature, red-fluorescing chromophore has the expected cis peptide bond and a sp(2)-hybridized Gln 66 Calpha with planar geometry, the crystal structure of the immature green-fluorescing chromophore of DsRed, presented here for the first time, reveals a trans peptide bond and a sp(3)-hybridized Gln 66 Calpha with tetrahedral geometry. These results characterize a GFP-like immature green DsRed chromophore structure, reveal distinct mature and immature chromophore environments, and furthermore provide evidence for the coupling of acylimine formation with trans-cis isomerization.
+
The line below this paragraph, {{ABSTRACT_PUBMED_16026155}}, adds the Publication Abstract to the page
 +
(as it appears on PubMed at http://www.pubmed.gov), where 16026155 is the PubMed ID number.
 +
-->
 +
{{ABSTRACT_PUBMED_16026155}}
==About this Structure==
==About this Structure==
Line 35: Line 39:
[[Category: Red]]
[[Category: Red]]
[[Category: Rfp]]
[[Category: Rfp]]
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 17:36:03 2008''
+
 
 +
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 22:30:00 2008''

Revision as of 19:30, 28 July 2008

Image:1zgp.png

Template:STRUCTURE 1zgp

Crystal Structure of the Discosoma Red Fluorescent Protein (DsRed) Variant K70M

Template:ABSTRACT PUBMED 16026155

About this Structure

1ZGP is a Single protein structure of sequence from Discosoma sp.. Full crystallographic information is available from OCA.

Reference

Crystallographic structures of Discosoma red fluorescent protein with immature and mature chromophores: linking peptide bond trans-cis isomerization and acylimine formation in chromophore maturation., Tubbs JL, Tainer JA, Getzoff ED, Biochemistry. 2005 Jul 26;44(29):9833-40. PMID:16026155

Page seeded by OCA on Mon Jul 28 22:30:00 2008

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1zgp"
Personal tools