7AV6 image
Deposition Date 2020-11-04
Release Date 2021-06-09
Last Version Date 2024-01-31
Entry Detail
PDB ID:
7AV6
Title:
FAST in a domain-swapped dimer form
Biological Source:
Source Organism:
Method Details:
Experimental Method:
Resolution:
1.50 Å
R-Value Free:
0.23
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 41 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Photoactive yellow protein
Gene (Uniprot):pyp
Chain IDs:A
Chain Length:138
Number of Molecules:1
Biological Source:Halorhodospira halophila
Ligand Molecules
Primary Citation
NanoFAST: structure-based design of a small fluorogen-activating protein with only 98 amino acids.
Chem Sci 12 6719 6725 (2021)
PMID: 34040747 DOI: 10.1039/d1sc01454d

Abstact

One of the essential characteristics of any tag used in bioscience and medical applications is its size. The larger the label, the more it may affect the studied object, and the more it may distort its behavior. In this paper, using NMR spectroscopy and X-ray crystallography, we have studied the structure of fluorogen-activating protein FAST both in the apo form and in complex with the fluorogen. We showed that significant change in the protein occurs upon interaction with the ligand. While the protein is completely ordered in the complex, its apo form is characterized by higher mobility and disordering of its N-terminus. We used structural information to design the shortened FAST (which we named nanoFAST) by truncating 26 N-terminal residues. Thus, we created the shortest genetically encoded tag among all known fluorescent and fluorogen-activating proteins, which is composed of only 98 amino acids.

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Primary Citation of related structures