How Botulinum Neurotoxin Light Chain A1 Maintains Stable Association with the Intracellular Neuronal Plasma Membrane.
How Botulinum Neurotoxin Light Chain A1 Maintains Stable Association with the Intracellular Neuronal Plasma Membrane.
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DOI:
10.3390/toxins14120814
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发表时间:
2022-11-22
期刊:
影响因子:
4.2
通讯作者:
Pellett S
中科院分区:
文献类型:
--
作者:
Gardner AP;Barbieri JT;Pellett S
Botulinum neurotoxin serotype A (BoNT/A) is the most potent protein toxin for humans and is utilized as a therapy for numerous neurologic diseases. BoNT/A comprises a catalytic Light Chain (LC/A) and a Heavy Chain (HC/A) and includes eight subtypes (BoNT/A1-/A8). Previously we showed BoNT/A potency positively correlated with stable localization on the intracellular plasma membrane and identified a low homology domain (amino acids 268–357) responsible for LC/A1 stable co-localization with SNAP-25 on the plasma membrane, while LC/A3 was present in the cytosol of Neuro2A cells. In the present study, steady-state- and live-imaging of a cytosolic LC/A3 derivative (LC/A3V) engineered to contain individual structural elements of the A1 LDH showed that a 59 amino acid region (275–334) termed the MLD was sufficient to direct LC/A3V from the cytosol to the plasma membrane co-localized with SNAP-25. Informatics and experimental validation of the MLD-predicted R1 region (an α-helix, residues 275–300) and R2 region (a loop, α-helix, loop, residues 302–334) both contribute independent steps to the stable co-localization of LC/A1 with SNAP-25 on the plasma membrane of Neuro-2A cells. Understanding how these structural elements contribute to the overall association of LC/A1 on the plasma membrane may identify the molecular basis for the LC contribution of BoNT/A1 to high potency.
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影响因子:
56.9
作者:
Dong, M;Yeh, F;Chapman, ER
通讯作者:
Chapman, ER
影响因子:
4.8
作者:
FALNES, PO;OLSNES, S
通讯作者:
OLSNES, S
影响因子:
64.8
作者:
Breidenbach, MA;Brunger, AT
通讯作者:
Brunger, AT
DOI:
10.1042/bcj20210719
发表时间:
2022-02-11
期刊:
The Biochemical journal
影响因子:
--
作者:
Koike S;Jahn R
通讯作者:
Jahn R
影响因子:
4.2
作者:
Binz T;Sikorra S;Mahrhold S
通讯作者:
Mahrhold S