RT Journal Article
T1 Spermine Sepharose as a clustered-charge anion exchange adsorbent
A1 Ruiz Ruiz, Fernando
A1 Dhamanea, Sagar
A1 Chen, Wen-Hsiang
A1 Kourentzic, Katerina
A1 Benavides, Jorge
A1 Rito Palomares, Marco
A1 Willson, Richard C.
AB We previously showed that the affinity and capacity of ion exchange adsorbents of a given total charge density are improved by immobilization of the charges in pre-ordered clusters, rather than individually in random locations. This previous work used pentalysinamide and pentaargininamide as clustered ligands. This approach allows close control of cluster size, but is uneconomically expensive for some research and most practical applications. In this work, we demonstrate that the inexpensive synthetic analog of the natural polyamine spermine (H2N-CH2-CH2-CH2-NH-CH2-CH2-CH2-CH2-NH-CH2-CH2-CH2 NH2) also can serve as the basis of effective clustered adsorbents. The calcium-depleted form of the protein a lactalbumin, and RNA from baker's yeast, were adsorbed on a spermine Sepharose adsorbent. This adsorbent exhibited enhanced alpha lactalbumin binding capacity (Q(max) >1.6 and 1.3-fold higher than those for Qiagen DEAE and GE DEAE Sepharose adsorbents of much greater charge density) and higher initial binding affinity (Q(max)/K-D 2.4 and 2.1 fold higher, respectively). The new spermine-based matrix exhibited a higher value of the Z parameter, suggesting an increased number of apparent interaction sites between the protein and the resin, and functioned well in column mode. (C) 2013 Elsevier B.V. All rights reserved.
PB Elsevier Science Bv
SN 0021-9673
YR 2014
FD 2014-01-10
LK https://hdl.handle.net/20.500.14352/33548
UL https://hdl.handle.net/20.500.14352/33548
LA eng
NO © 2013 Elsevier B.V. All rights reserved.This research was funded by the Robert A. Welch foundation under Grant E-1264 and the National Science Foundation (NSF) Division of Chemical, Bioengineering, Environmental, and Transport Systems (CBET-1133965). The authors also acknowledge Tecnológico de Monterrey Research chair (Grant CAT161) and CONACyT for fellowship #295368 to FRR.
NO Robert A. Welch foundation
NO National Science Foundation (NSF)
NO CONACyT
NO Tecnológico de Monterrey
DS Docta Complutense
RD 12 abr 2025