---
_id: '13212'
abstract:
- lang: eng
text: Auxin is the major plant hormone regulating growth and development (Friml,
2022). Forward genetic approaches in the model plant Arabidopsis thaliana have
identified major components of auxin signalling and established the canonical
mechanism mediating transcriptional and thus developmental reprogramming. In this
textbook view, TRANSPORT INHIBITOR RESPONSE 1 (TIR1)/AUXIN-SIGNALING F-BOX (AFBs)
are auxin receptors, which act as F-box subunits determining the substrate specificity
of the Skp1-Cullin1-F box protein (SCF) type E3 ubiquitin ligase complex. Auxin
acts as a “molecular glue” increasing the affinity between TIR1/AFBs and the Aux/IAA
repressors. Subsequently, Aux/IAAs are ubiquitinated and degraded, thus releasing
auxin transcription factors from their repression making them free to mediate
transcription of auxin response genes (Yu et al., 2022). Nonetheless, accumulating
evidence suggests existence of rapid, non-transcriptional responses downstream
of TIR1/AFBs such as auxin-induced cytosolic calcium (Ca2+) transients, plasma
membrane depolarization and apoplast alkalinisation, all converging on the process
of root growth inhibition and root gravitropism (Li et al., 2022). Particularly,
these rapid responses are mostly contributed by predominantly cytosolic AFB1,
while the long-term growth responses are mediated by mainly nuclear TIR1 and AFB2-AFB5
(Li et al., 2021; Prigge et al., 2020; Serre et al., 2021). How AFB1 conducts
auxin-triggered rapid responses and how it is different from TIR1 and AFB2-AFB5
remains elusive. Here, we compare the roles of TIR1 and AFB1 in transcriptional
and rapid responses by modulating their subcellular localization in Arabidopsis
and by testing their ability to mediate transcriptional responses when part of
the minimal auxin circuit reconstituted in yeast.
acknowledged_ssus:
- _id: LifeSc
- _id: Bio
acknowledgement: We thank all the authors for sharing the published materials. This
research was supported by the Lab Support Facility and the Imaging and Optics Facility
of ISTA. We thank Lukáš Fiedler (ISTA) for critical reading of the manuscript. This
project was funded by the European Research Council Advanced Grant (ETAP-742985).
article_processing_charge: Yes (via OA deal)
article_type: letter_note
author:
- first_name: Huihuang
full_name: Chen, Huihuang
id: 83c96512-15b2-11ec-abd3-b7eede36184f
last_name: Chen
- first_name: Lanxin
full_name: Li, Lanxin
id: 367EF8FA-F248-11E8-B48F-1D18A9856A87
last_name: Li
orcid: 0000-0002-5607-272X
- first_name: Minxia
full_name: Zou, Minxia
id: 5c243f41-03f3-11ec-841c-96faf48a7ef9
last_name: Zou
- first_name: Linlin
full_name: Qi, Linlin
id: 44B04502-A9ED-11E9-B6FC-583AE6697425
last_name: Qi
orcid: 0000-0001-5187-8401
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Chen H, Li L, Zou M, Qi L, Friml J. Distinct functions of TIR1 and AFB1 receptors
in auxin signalling. Molecular Plant. 2023;16(7):1117-1119. doi:10.1016/j.molp.2023.06.007
apa: Chen, H., Li, L., Zou, M., Qi, L., & Friml, J. (2023). Distinct functions
of TIR1 and AFB1 receptors in auxin signalling. Molecular Plant. Elsevier
. https://doi.org/10.1016/j.molp.2023.06.007
chicago: Chen, Huihuang, Lanxin Li, Minxia Zou, Linlin Qi, and Jiří Friml. “Distinct
Functions of TIR1 and AFB1 Receptors in Auxin Signalling.” Molecular Plant.
Elsevier , 2023. https://doi.org/10.1016/j.molp.2023.06.007.
ieee: H. Chen, L. Li, M. Zou, L. Qi, and J. Friml, “Distinct functions of TIR1 and
AFB1 receptors in auxin signalling.,” Molecular Plant, vol. 16, no. 7.
Elsevier , pp. 1117–1119, 2023.
ista: Chen H, Li L, Zou M, Qi L, Friml J. 2023. Distinct functions of TIR1 and AFB1
receptors in auxin signalling. Molecular Plant. 16(7), 1117–1119.
mla: Chen, Huihuang, et al. “Distinct Functions of TIR1 and AFB1 Receptors in Auxin
Signalling.” Molecular Plant, vol. 16, no. 7, Elsevier , 2023, pp. 1117–19,
doi:10.1016/j.molp.2023.06.007.
short: H. Chen, L. Li, M. Zou, L. Qi, J. Friml, Molecular Plant 16 (2023) 1117–1119.
date_created: 2023-07-12T07:32:46Z
date_published: 2023-07-01T00:00:00Z
date_updated: 2024-01-29T10:38:57Z
day: '01'
ddc:
- '580'
department:
- _id: JiFr
doi: 10.1016/j.molp.2023.06.007
ec_funded: 1
external_id:
isi:
- '001044410900001'
pmid:
- '37393433'
file:
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creator: dernst
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file_name: 2023_MolecularPlant_Chen.pdf
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relation: main_file
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has_accepted_license: '1'
intvolume: ' 16'
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language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-nd/4.0/
month: '07'
oa: 1
oa_version: Published Version
page: 1117-1119
pmid: 1
project:
- _id: 261099A6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742985'
name: Tracing Evolution of Auxin Transport and Polarity in Plants
publication: Molecular Plant
publication_identifier:
eissn:
- 1674-2052
issn:
- 1752-9867
publication_status: published
publisher: 'Elsevier '
quality_controlled: '1'
scopus_import: '1'
status: public
title: Distinct functions of TIR1 and AFB1 receptors in auxin signalling.
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2023'
...
---
_id: '12144'
abstract:
- lang: eng
text: The phytohormone auxin is the major coordinative signal in plant development1,
mediating transcriptional reprogramming by a well-established canonical signalling
pathway. TRANSPORT INHIBITOR RESPONSE 1 (TIR1)/AUXIN-SIGNALING F-BOX (AFB) auxin
receptors are F-box subunits of ubiquitin ligase complexes. In response to auxin,
they associate with Aux/IAA transcriptional repressors and target them for degradation
via ubiquitination2,3. Here we identify adenylate cyclase (AC) activity as an
additional function of TIR1/AFB receptors across land plants. Auxin, together
with Aux/IAAs, stimulates cAMP production. Three separate mutations in the AC
motif of the TIR1 C-terminal region, all of which abolish the AC activity, each
render TIR1 ineffective in mediating gravitropism and sustained auxin-induced
root growth inhibition, and also affect auxin-induced transcriptional regulation.
These results highlight the importance of TIR1/AFB AC activity in canonical auxin
signalling. They also identify a unique phytohormone receptor cassette combining
F-box and AC motifs, and the role of cAMP as a second messenger in plants.
acknowledged_ssus:
- _id: LifeSc
- _id: Bio
acknowledgement: This research was supported by the Lab Support Facility (LSF) and
the Imaging and Optics Facility (IOF) of IST Austria. We thank C. Gehring for suggestions
and advice; and K. U. Torii and G. Stacey for seeds and plasmids. This project was
funded by a European Research Council Advanced Grant (ETAP-742985). M.F.K. and R.N.
acknowledge the support of the EU MSCA-IF project CrysPINs (792329). M.K. was supported
by the project POWR.03.05.00-00-Z302/17 Universitas Copernicana Thoruniensis in
Futuro–IDS “Academia Copernicana”. CIDG acknowledges support from UKRI under Future
Leaders Fellowship grant number MR/T020652/1.
article_processing_charge: No
article_type: original
author:
- first_name: Linlin
full_name: Qi, Linlin
id: 44B04502-A9ED-11E9-B6FC-583AE6697425
last_name: Qi
orcid: 0000-0001-5187-8401
- first_name: Mateusz
full_name: Kwiatkowski, Mateusz
last_name: Kwiatkowski
- first_name: Huihuang
full_name: Chen, Huihuang
id: 83c96512-15b2-11ec-abd3-b7eede36184f
last_name: Chen
- first_name: Lukas
full_name: Hörmayer, Lukas
id: 2EEE7A2A-F248-11E8-B48F-1D18A9856A87
last_name: Hörmayer
orcid: 0000-0001-8295-2926
- first_name: Scott A
full_name: Sinclair, Scott A
id: 2D99FE6A-F248-11E8-B48F-1D18A9856A87
last_name: Sinclair
orcid: 0000-0002-4566-0593
- first_name: Minxia
full_name: Zou, Minxia
id: 5c243f41-03f3-11ec-841c-96faf48a7ef9
last_name: Zou
- first_name: Charo I.
full_name: del Genio, Charo I.
last_name: del Genio
- first_name: Martin F.
full_name: Kubeš, Martin F.
last_name: Kubeš
- first_name: Richard
full_name: Napier, Richard
last_name: Napier
- first_name: Krzysztof
full_name: Jaworski, Krzysztof
last_name: Jaworski
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Qi L, Kwiatkowski M, Chen H, et al. Adenylate cyclase activity of TIR1/AFB
auxin receptors in plants. Nature. 2022;611(7934):133-138. doi:10.1038/s41586-022-05369-7
apa: Qi, L., Kwiatkowski, M., Chen, H., Hörmayer, L., Sinclair, S. A., Zou, M.,
… Friml, J. (2022). Adenylate cyclase activity of TIR1/AFB auxin receptors in
plants. Nature. Springer Nature. https://doi.org/10.1038/s41586-022-05369-7
chicago: Qi, Linlin, Mateusz Kwiatkowski, Huihuang Chen, Lukas Hörmayer, Scott A
Sinclair, Minxia Zou, Charo I. del Genio, et al. “Adenylate Cyclase Activity of
TIR1/AFB Auxin Receptors in Plants.” Nature. Springer Nature, 2022. https://doi.org/10.1038/s41586-022-05369-7.
ieee: L. Qi et al., “Adenylate cyclase activity of TIR1/AFB auxin receptors
in plants,” Nature, vol. 611, no. 7934. Springer Nature, pp. 133–138, 2022.
ista: Qi L, Kwiatkowski M, Chen H, Hörmayer L, Sinclair SA, Zou M, del Genio CI,
Kubeš MF, Napier R, Jaworski K, Friml J. 2022. Adenylate cyclase activity of TIR1/AFB
auxin receptors in plants. Nature. 611(7934), 133–138.
mla: Qi, Linlin, et al. “Adenylate Cyclase Activity of TIR1/AFB Auxin Receptors
in Plants.” Nature, vol. 611, no. 7934, Springer Nature, 2022, pp. 133–38,
doi:10.1038/s41586-022-05369-7.
short: L. Qi, M. Kwiatkowski, H. Chen, L. Hörmayer, S.A. Sinclair, M. Zou, C.I.
del Genio, M.F. Kubeš, R. Napier, K. Jaworski, J. Friml, Nature 611 (2022) 133–138.
date_created: 2023-01-12T12:06:05Z
date_published: 2022-11-03T00:00:00Z
date_updated: 2023-10-03T11:04:53Z
day: '03'
department:
- _id: JiFr
doi: 10.1038/s41586-022-05369-7
ec_funded: 1
external_id:
isi:
- '000875061600013'
pmid:
- '36289340'
intvolume: ' 611'
isi: 1
issue: '7934'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://wrap.warwick.ac.uk/168325/1/WRAP-denylate-cyclase-activity-TIR1-AFB-auxin-receptors-root-growth-22.pdf
month: '11'
oa: 1
oa_version: Submitted Version
page: 133-138
pmid: 1
project:
- _id: 261099A6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742985'
name: Tracing Evolution of Auxin Transport and Polarity in Plants
publication: Nature
publication_identifier:
eissn:
- 1476-4687
issn:
- 0028-0836
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Adenylate cyclase activity of TIR1/AFB auxin receptors in plants
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 611
year: '2022'
...
---
_id: '12291'
abstract:
- lang: eng
text: The phytohormone auxin triggers transcriptional reprogramming through a well-characterized
perception machinery in the nucleus. By contrast, mechanisms that underlie fast
effects of auxin, such as the regulation of ion fluxes, rapid phosphorylation
of proteins or auxin feedback on its transport, remain unclear1,2,3. Whether auxin-binding
protein 1 (ABP1) is an auxin receptor has been a source of debate for decades1,4.
Here we show that a fraction of Arabidopsis thaliana ABP1 is secreted and binds
auxin specifically at an acidic pH that is typical of the apoplast. ABP1 and its
plasma-membrane-localized partner, transmembrane kinase 1 (TMK1), are required
for the auxin-induced ultrafast global phospho-response and for downstream processes
that include the activation of H+-ATPase and accelerated cytoplasmic streaming.
abp1 and tmk mutants cannot establish auxin-transporting channels and show defective
auxin-induced vasculature formation and regeneration. An ABP1(M2X) variant that
lacks the capacity to bind auxin is unable to complement these defects in abp1
mutants. These data indicate that ABP1 is the auxin receptor for TMK1-based cell-surface
signalling, which mediates the global phospho-response and auxin canalization.
acknowledged_ssus:
- _id: Bio
- _id: EM-Fac
- _id: LifeSc
acknowledgement: We acknowledge K. Kubiasová for excellent technical assistance, J.
Neuhold, A. Lehner and A. Sedivy for technical assistance with protein production
and purification at Vienna Biocenter Core Facilities; Creoptix for performing GCI;
and the Bioimaging, Electron Microscopy and Life Science Facilities at ISTA, the
Plant Sciences Core Facility of CEITEC Masaryk University, the Core Facility CELLIM
(MEYS CR, LM2018129 Czech-BioImaging) and J. Sprakel for their assistance. J.F.
is grateful to R. Napier for many insightful suggestions and support. We thank all
past and present members of the Friml group for their support and for other contributions
to this effort to clarify the controversial role of ABP1 over the past seven years.
The project received funding from the European Research Council (ERC) under the
European Union’s Horizon 2020 research and innovation program (grant agreement no.
742985 to J.F. and 833867 to D.W.); the Austrian Science Fund (FWF; P29988 to J.F.);
the Netherlands Organization for Scientific Research (NWO; VICI grant 865.14.001
to D.W. and VENI grant VI.Veni.212.003 to A.K.); the Ministry of Education, Science
and Technological Development of the Republic of Serbia (contract no. 451-03-68/2022-14/200053
to B.D.Ž.); and the MEXT/JSPS KAKENHI to K.T. (20K06685) and T.K. (20H05687 and
20H05910).
article_processing_charge: No
article_type: original
author:
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Michelle C
full_name: Gallei, Michelle C
id: 35A03822-F248-11E8-B48F-1D18A9856A87
last_name: Gallei
orcid: 0000-0003-1286-7368
- first_name: Zuzana
full_name: Gelová, Zuzana
id: 0AE74790-0E0B-11E9-ABC7-1ACFE5697425
last_name: Gelová
orcid: 0000-0003-4783-1752
- first_name: Alexander J
full_name: Johnson, Alexander J
id: 46A62C3A-F248-11E8-B48F-1D18A9856A87
last_name: Johnson
orcid: 0000-0002-2739-8843
- first_name: Ewa
full_name: Mazur, Ewa
last_name: Mazur
- first_name: Aline
full_name: Monzer, Aline
id: 2DB5D88C-D7B3-11E9-B8FD-7907E6697425
last_name: Monzer
- first_name: Lesia
full_name: Rodriguez Solovey, Lesia
id: 3922B506-F248-11E8-B48F-1D18A9856A87
last_name: Rodriguez Solovey
orcid: 0000-0002-7244-7237
- first_name: Mark
full_name: Roosjen, Mark
last_name: Roosjen
- first_name: Inge
full_name: Verstraeten, Inge
id: 362BF7FE-F248-11E8-B48F-1D18A9856A87
last_name: Verstraeten
orcid: 0000-0001-7241-2328
- first_name: Branka D.
full_name: Živanović, Branka D.
last_name: Živanović
- first_name: Minxia
full_name: Zou, Minxia
id: 5c243f41-03f3-11ec-841c-96faf48a7ef9
last_name: Zou
- first_name: Lukas
full_name: Fiedler, Lukas
id: 7c417475-8972-11ed-ae7b-8b674ca26986
last_name: Fiedler
- first_name: Caterina
full_name: Giannini, Caterina
id: e3fdddd5-f6e0-11ea-865d-ca99ee6367f4
last_name: Giannini
- first_name: Peter
full_name: Grones, Peter
last_name: Grones
- first_name: Mónika
full_name: Hrtyan, Mónika
id: 45A71A74-F248-11E8-B48F-1D18A9856A87
last_name: Hrtyan
- first_name: Walter
full_name: Kaufmann, Walter
id: 3F99E422-F248-11E8-B48F-1D18A9856A87
last_name: Kaufmann
orcid: 0000-0001-9735-5315
- first_name: Andre
full_name: Kuhn, Andre
last_name: Kuhn
- first_name: Madhumitha
full_name: Narasimhan, Madhumitha
id: 44BF24D0-F248-11E8-B48F-1D18A9856A87
last_name: Narasimhan
orcid: 0000-0002-8600-0671
- first_name: Marek
full_name: Randuch, Marek
id: 6ac4636d-15b2-11ec-abd3-fb8df79972ae
last_name: Randuch
- first_name: Nikola
full_name: Rýdza, Nikola
last_name: Rýdza
- first_name: Koji
full_name: Takahashi, Koji
last_name: Takahashi
- first_name: Shutang
full_name: Tan, Shutang
id: 2DE75584-F248-11E8-B48F-1D18A9856A87
last_name: Tan
orcid: 0000-0002-0471-8285
- first_name: Anastasiia
full_name: Teplova, Anastasiia
id: e3736151-106c-11ec-b916-c2558e2762c6
last_name: Teplova
- first_name: Toshinori
full_name: Kinoshita, Toshinori
last_name: Kinoshita
- first_name: Dolf
full_name: Weijers, Dolf
last_name: Weijers
- first_name: Hana
full_name: Rakusová, Hana
last_name: Rakusová
citation:
ama: Friml J, Gallei MC, Gelová Z, et al. ABP1–TMK auxin perception for global phosphorylation
and auxin canalization. Nature. 2022;609(7927):575-581. doi:10.1038/s41586-022-05187-x
apa: Friml, J., Gallei, M. C., Gelová, Z., Johnson, A. J., Mazur, E., Monzer, A.,
… Rakusová, H. (2022). ABP1–TMK auxin perception for global phosphorylation and
auxin canalization. Nature. Springer Nature. https://doi.org/10.1038/s41586-022-05187-x
chicago: Friml, Jiří, Michelle C Gallei, Zuzana Gelová, Alexander J Johnson, Ewa
Mazur, Aline Monzer, Lesia Rodriguez Solovey, et al. “ABP1–TMK Auxin Perception
for Global Phosphorylation and Auxin Canalization.” Nature. Springer Nature,
2022. https://doi.org/10.1038/s41586-022-05187-x.
ieee: J. Friml et al., “ABP1–TMK auxin perception for global phosphorylation
and auxin canalization,” Nature, vol. 609, no. 7927. Springer Nature, pp.
575–581, 2022.
ista: Friml J, Gallei MC, Gelová Z, Johnson AJ, Mazur E, Monzer A, Rodriguez Solovey
L, Roosjen M, Verstraeten I, Živanović BD, Zou M, Fiedler L, Giannini C, Grones
P, Hrtyan M, Kaufmann W, Kuhn A, Narasimhan M, Randuch M, Rýdza N, Takahashi K,
Tan S, Teplova A, Kinoshita T, Weijers D, Rakusová H. 2022. ABP1–TMK auxin perception
for global phosphorylation and auxin canalization. Nature. 609(7927), 575–581.
mla: Friml, Jiří, et al. “ABP1–TMK Auxin Perception for Global Phosphorylation and
Auxin Canalization.” Nature, vol. 609, no. 7927, Springer Nature, 2022,
pp. 575–81, doi:10.1038/s41586-022-05187-x.
short: J. Friml, M.C. Gallei, Z. Gelová, A.J. Johnson, E. Mazur, A. Monzer, L. Rodriguez
Solovey, M. Roosjen, I. Verstraeten, B.D. Živanović, M. Zou, L. Fiedler, C. Giannini,
P. Grones, M. Hrtyan, W. Kaufmann, A. Kuhn, M. Narasimhan, M. Randuch, N. Rýdza,
K. Takahashi, S. Tan, A. Teplova, T. Kinoshita, D. Weijers, H. Rakusová, Nature
609 (2022) 575–581.
date_created: 2023-01-16T10:04:48Z
date_published: 2022-09-15T00:00:00Z
date_updated: 2023-11-07T08:16:09Z
day: '15'
ddc:
- '580'
department:
- _id: JiFr
- _id: GradSch
- _id: EvBe
- _id: EM-Fac
doi: 10.1038/s41586-022-05187-x
ec_funded: 1
external_id:
isi:
- '000851357500002'
pmid:
- '36071161'
file:
- access_level: open_access
checksum: a6055c606aefb900bf62ae3e7d15f921
content_type: application/pdf
creator: amally
date_created: 2023-11-02T17:12:37Z
date_updated: 2023-11-02T17:12:37Z
file_id: '14483'
file_name: Friml Nature 2022_merged.pdf
file_size: 79774945
relation: main_file
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file_date_updated: 2023-11-02T17:12:37Z
has_accepted_license: '1'
intvolume: ' 609'
isi: 1
issue: '7927'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Submitted Version
page: 575-581
pmid: 1
project:
- _id: 261099A6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742985'
name: Tracing Evolution of Auxin Transport and Polarity in Plants
- _id: 262EF96E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29988
name: RNA-directed DNA methylation in plant development
publication: Nature
publication_identifier:
eissn:
- 1476-4687
issn:
- 0028-0836
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: ABP1–TMK auxin perception for global phosphorylation and auxin canalization
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 609
year: '2022'
...