Rapid purification method for human SFPQ by implementing zinc-induced polymerization.

Abstract:

:Splicing factor proline- and glutamine-rich (SFPQ) is an RNA-binding protein, playing significant roles in gene regulation and subnuclear body formation. Our recent serendipitous discovery showed that SFPQ binds zinc directly and forms an infinite polymer that is induced by zinc binding to the protein. The zinc-induced reversible polymerization has led us to exploit this property to develop a rapid purification strategy for SFPQ without the use of affinity tags. In combination with the variation of ionic strength for salting-out of SFPQ, the reversible zinc-induced precipitation of SFPQ reduced the purification time required to obtain pure SFPQ to a single day. The purified protein was subjected to the previously reported crystallization condition. The resulting crystals diffracted to 2.22 Å resolution, confirming the quality of SFPQ purified with this new rapid purification strategy.

journal_name

Protein Expr Purif

authors

Lim YW,Lee M

doi

10.1016/j.pep.2020.105626

subject

Has Abstract

pub_date

2020-07-01 00:00:00

pages

105626

eissn

1046-5928

issn

1096-0279

pii

S1046-5928(20)30095-4

journal_volume

171

pub_type

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