Synaptotagmin binding to botulinum neurotoxins
Martínez-Carranza, Markel LU ; Blasco, Pilar ; Gustafsson, Robert ; Dong, Min ; Berntsson, Ronnie P-A ; Widmalm, Göran and Stenmark, Pål LU
(2020)
In Biochemistry
59(4).
p.491-498
- Abstract
Botulinum neurotoxins (BoNTs) are exceptionally toxic proteins that cause paralysis, but are also extensively used as treatment for various medical conditions. Most BoNTs bind two receptors on neuronal cells, namely a ganglioside and a protein receptor. Differences in the sequence between the protein receptors from different species can impact the binding affinity and toxicity of the BoNTs. Here we have investigated how BoNT/B, /DC, and /G, all three toxins that utilize Synaptotagmin I and II (Syt-I/II) as their protein receptors, bind to Syt-I and-II from mouse/rat, bovine and human origin by isothermal titration calorimetry analysis. BoNT/G had the highest affinity to human Syt-I and BoNT/DC had the highest affinity for bovine Syt-II.... (More)
Botulinum neurotoxins (BoNTs) are exceptionally toxic proteins that cause paralysis, but are also extensively used as treatment for various medical conditions. Most BoNTs bind two receptors on neuronal cells, namely a ganglioside and a protein receptor. Differences in the sequence between the protein receptors from different species can impact the binding affinity and toxicity of the BoNTs. Here we have investigated how BoNT/B, /DC, and /G, all three toxins that utilize Synaptotagmin I and II (Syt-I/II) as their protein receptors, bind to Syt-I and-II from mouse/rat, bovine and human origin by isothermal titration calorimetry analysis. BoNT/G had the highest affinity to human Syt-I and BoNT/DC had the highest affinity for bovine Syt-II. As expected, BoNT/B, /DC and /G showed very low binding to human Syt-II. Furthermore, we carried out saturation difference transfer (STD) and STD-TOCSY NMR experiments that revealed the region of the Syt peptide in direct contact with BoNT/G, which demonstrate that BoNT/G recognizes the Syt peptide in a similar model as in the established BoNT/B-Syt-II complex. Our analyses also revealed that regions outside the Syt peptide's toxin binding region are important for the helicity of the peptide, and therefore the binding affinity.
(Less)
- author
- Martínez-Carranza, Markel
LU
; Blasco, Pilar
; Gustafsson, Robert
; Dong, Min
; Berntsson, Ronnie P-A
; Widmalm, Göran
and Stenmark, Pål
LU
- organization
- publishing date
- 2020-02-04
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Biochemistry
- volume
- 59
- issue
- 4
- pages
- 8 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85076990418
- pmid:31809018
- ISSN
- 0006-2960
- DOI
- 10.1021/acs.biochem.9b00554
- language
- English
- LU publication?
- yes
- id
- 778a764d-84a1-4894-ae6b-732170032fbd
- date added to LUP
- 2019-12-11 12:44:56
- date last changed
- 2024-04-02 23:08:59
@article{778a764d-84a1-4894-ae6b-732170032fbd,
abstract = {{<p>Botulinum neurotoxins (BoNTs) are exceptionally toxic proteins that cause paralysis, but are also extensively used as treatment for various medical conditions. Most BoNTs bind two receptors on neuronal cells, namely a ganglioside and a protein receptor. Differences in the sequence between the protein receptors from different species can impact the binding affinity and toxicity of the BoNTs. Here we have investigated how BoNT/B, /DC, and /G, all three toxins that utilize Synaptotagmin I and II (Syt-I/II) as their protein receptors, bind to Syt-I and-II from mouse/rat, bovine and human origin by isothermal titration calorimetry analysis. BoNT/G had the highest affinity to human Syt-I and BoNT/DC had the highest affinity for bovine Syt-II. As expected, BoNT/B, /DC and /G showed very low binding to human Syt-II. Furthermore, we carried out saturation difference transfer (STD) and STD-TOCSY NMR experiments that revealed the region of the Syt peptide in direct contact with BoNT/G, which demonstrate that BoNT/G recognizes the Syt peptide in a similar model as in the established BoNT/B-Syt-II complex. Our analyses also revealed that regions outside the Syt peptide's toxin binding region are important for the helicity of the peptide, and therefore the binding affinity.</p>}},
author = {{Martínez-Carranza, Markel and Blasco, Pilar and Gustafsson, Robert and Dong, Min and Berntsson, Ronnie P-A and Widmalm, Göran and Stenmark, Pål}},
issn = {{0006-2960}},
language = {{eng}},
month = {{02}},
number = {{4}},
pages = {{491--498}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Biochemistry}},
title = {{Synaptotagmin binding to botulinum neurotoxins}},
url = {{http://dx.doi.org/10.1021/acs.biochem.9b00554}},
doi = {{10.1021/acs.biochem.9b00554}},
volume = {{59}},
year = {{2020}},
}