IP Library › Granted Patent US 12,190,997
Granted Patent B2
US 12,190,997 · App. 17/267,240 · Granted Jan 7, 2025

Genetically altered LysM receptors with altered agonist specificity and affinity

Inventors: Kasper Røjkjær Andersen (Aarhus, DK); Kira Gysel (Aarhus, DK); Elena Simona Radutoiu (Aarhus, DK); Zoltan Bozsoki (Aarhus, DK); Lene Heegaard Madsen (Aarhus, DK); Simon Boje Hansen (Aarhus, DK); Jens Stougaard Jensen (Aarhus, DK)
Assignee: Aarhus Universitet
G16B15/30C12N9/1205
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Quick Facts
Patent No.
US 12,190,997
App. No.
17/267,240
Granted
Jan 7, 2025
Kind
B2
Abstract

Aspects of the present disclosure relates to genetically altered LysM receptors. In particular, the present disclosure relates to a hydrophobic patch into the LysM2 domain which can increase affinity and/or selectivity for LCOs and by replacement of regions in the LysM1 domain with the corresponding regions of the LysM1 domain from a donor LysM receptor that can alter the affinity and/or selectivity for the oligosaccharide particularly for LCOs and can alter the specificity between LCO when using regions from a high affinity and specificity LCO LysM receptor such as a legume NFR1 receptor. The present disclosure also relates to genetically altering LysM receptors in plants to include a hydrophobic patch or alter the hydrophobic patch and to genetically altering LysM receptors in plants by replacement of regions in the LysM2 domain.

Claims (24)

1. A method for selection of a target plant lysin motif (LysM) receptor and modifying the target plant LysM receptor to have a desired receptor characteristic, comprising:

(a) providing a structural model, a molecular model, a surface characteristics model, an electrostatic potential model, or combinations thereof of a donor plant LysM receptor having the desired receptor characteristic and two or more potential target plant LysM receptors, wherein the desired receptor characteristic is affinity, selectivity, specificity, or combinations thereof for an oligosaccharide or class of oligosaccharides;

(b) comparing each of the two or more potential target plant LysM receptors with the structural model, the molecular model, the surface characteristics model, the electrostatic potential model of the donor plant LysM receptor, or combinations thereof; or comparing each of the two or more potential target plant LysM receptors with the donor plant LysM receptor using structural overlay;

(c) selecting the potential target plant LysM receptor for modification;

(d) identifying one or more amino acid residues for modification in the target LysM receptor by comparing amino acid residues of a first oligosaccharide binding feature in the donor plant LysM receptor with the corresponding amino acid residues in the target plant LysM receptor; and

(e) generating a modified plant LysM receptor wherein the one or more amino acid residues in the first oligosaccharide binding feature of the target plant LysM receptor have been substituted with corresponding amino acid residues from the donor plant LysM receptor; wherein (i) the one or more amino acid residues in the first oligosaccharide binding feature include amino acids corresponding to SEQ ID NO: 63 and SEQ ID NO: 64 of Lotus japonicus NFR5, (ii) the one or more amino acid residues in the first oligosaccharide binding feature include amino acids corresponding to L147, L151, L152, L154, T156, K157, and V158 of Medicago NFP (SEQ ID NO: 1), (iii) the one or more amino acid residues in the first oligosaccharide binding feature include amino acids corresponding to SEQ ID NO: 28 and SEQ ID NO: 29 of Lotus NFR1 and/or SEQ ID NO: 30 and SEQ ID NO: 31 of Lotus CERK6, or (iv) the one or more amino acid residues in the first oligosaccharide binding feature include combinations of (i)-(iii).

2. The method of claim 1 , wherein the criteria for selecting the potential target plant LysM receptor for modification in step (c) are selected from the group consisting of goodness of fit to template structure; similarity; surface potential; coverage to template structure; Global Model Quality Estimation (GMQE), Qualitative Model Energy ANalysis (QMEAN), and Local Quality estimates from SWISS-Model; and any combination thereof.

3. The method of claim 1 , wherein the structural model of the donor plant LysM receptor is a protein crystal structure, a molecular model, a cryo-EM structure, or a NMR structure.

4. The method of claim 1 , wherein the donor plant LysM receptor model is of a LysM1 domain, a LysM2 domain, a LysM3 domain, or any combination thereof; and the two or more potential target plant LysM receptor models are of corresponding LysM1 domains, LysM2 domains, LysM3 domains, or any combination thereof.

5. The method of claim 1 , wherein the donor plant LysM receptor is Medicago NFP (SEQ ID NO: 1), Medicago LYK3 (SEQ ID NO: 71), Lotus NFR1 (SEQ ID NO: 99), Lotus NFR5 (SEQ ID NO: 2), Lotus LYS11 (SEQ ID NO: 11), or Arabidopsis CERK1 (SEQ ID NO: 75).

6. The method of claim 5 , wherein the two or more target plant LysM receptors are additionally compared to Lotus CERK6.

7. The method of claim 1 , wherein the two or more potential target plant LysM receptor polypeptides are all from the same plant species or plant variety.

8. The method of claim 1 , wherein the desired receptor characteristic is binding kinetics for an oligosaccharide or class of oligosaccharides, wherein the binding kinetics comprise off-rate and on-rate.

9. The method of claim 1 , wherein the class of oligosaccharides is selected from the group consisting of lipo-chitooligosaccharides (LCOs), chitooligosaccharides (COs), beta-glucans, cyclic-beta-glucans, exopolysaccharides, and lipopolysaccharides (LPS).

10. The method of claim 9 , wherein the class of oligosaccharides is LCOs or COs.

11. The method of claim 10 , wherein the class of oligosaccharides is LCOs, and wherein the LCOs are produced by a nitrogen-fixing bacteria selected from the group consisting of Mesorhizobium loti, Mesorhizobium huakuii, Mesorhizobium mediterraneum, Mesorhizobium ciceri, Mesorhizobium spp., Rhizobium mongolense, Rhizobium tropici, Rhizobium etli phaseoli, Rhizobium giardinii, Rhizobium leguminosarum, Burkholderiales, Sinorhizobium meliloti, Sinorhizobium medicae, Sinorhizobium fredii, Sinorhizobium NGR234, Azorhizobium caulinodans, Bradyrhizobium japonicum, Bradyrhizobium elkanii, Bradyrhizobium liaonginense, Frankia spp., and any combination thereof; or produced by a mycorrhizal fungi selected from the group consisting of Acaulosporaceae spp., Diversisporaceae spp., Gigasporaceae spp., Pacisporaceae spp., Funneliformis spp., Glomus spp., Rhizophagus spp., Sclerocystis spp., Septoglomus spp., Claroideoglomus spp., Ambispora spp., Archaeospora spp., Geosiphon pyriformis, Paraglomus spp., other species in the division Glomeromycota , and any combination thereof.

12. The method of claim 11 , wherein at least one of the LCOs is M. loti LCO, S. meliloti LCO-IV, or S. meliloti LCO-V.

13. The method of claim 1 , wherein the first oligosaccharide binding feature is a hydrophobic patch on the surface of the LysM2 domain.

14. The method of claim 1 , wherein step (d) further comprises identifying one or more amino acid residues for modification in the target LysM receptor by comparing amino acid residues of a second oligosaccharide binding feature in the donor plant LysM receptor with the corresponding amino acid residues in the target plant LysM receptor;

wherein step (e) further comprises the one or more amino acid residues in the second oligosaccharide binding feature of the target plant LysM receptor have been substituted with corresponding amino acid residues from the donor plant LysM receptor; and

wherein the second oligosaccharide binding feature is a part of the LysM1 domain of the donor plant LysM receptor.

15. The method of claim 1 , wherein the one or more amino acid residues in the first oligosaccharide binding feature include amino acids corresponding to SEQ ID NO: 63 and SEQ ID NO: 64 of Lotus japonicus NFR5.

16. The method of claim 1 , wherein the one or more amino acid residues in the first oligosaccharide binding feature include amino acids corresponding to L147, L151, L152, L154, T156, K157, and V158 of Medicago NFP (SEQ ID NO: 1).

17. The method of claim 1 , wherein the one or more amino acid residues in the first oligosaccharide binding feature include amino acids corresponding to SEQ ID NO: 28 and SEQ ID NO: 29 of Lotus japonicus NFR1 or SEQ ID NO: 30 and SEQ ID NO: 31 of Lotus japonicus CERK6.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 9, 2024
From: ANDERSEN, KASPER RØJKJÆR; GYSEL, KIRA; RADUTOIU, ELENA SIMONA; BOZSOKI, ZOLTAN; MADSEN, LENE HEEGAARD; HANSEN, SIMON BOJE; JENSEN, JENS STOUGAARD
To: AARHUS UNIVERSITET
Reel/Frame 066426/0584 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 11, 2021
From: ANDERSEN, KASPER RØJKJÆR; GYSEL, KIRA; RADUTOIU, SIMONA; BOZSOKI, ZOLTAN; MADSEN, LENE HEEGAARD; HANSEN, SIMON BOJE; STOUGAARD, JENS
To: AARHUS UNIVERSITET
Reel/Frame 056513/0770 →
Continuity (2)
Provisional Application 62718282 · Aug 13, 2018
Related Publication 20210233608A1 · Jul 29, 2021
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