Sulfonated Sclerostin Antibodies for Bone Density Regulation

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Solution Overview

Problem

Current methods for detecting and analyzing sulfonation modifications in proteins are limited, particularly in identifying and distinguishing between sulfonated and unsulfonated forms, which affects the understanding and targeting of sulfonation-dependent biological properties in proteins like Sclerostin involved in Wnt signaling and bone mineral density regulation.

Innovation Solution

Development of antibodies specific to sulfonated regions of Sclerostin, along with the use of mass spectrometry and sulfonation enzymes like TPST-1, to recognize and modulate sulfonation-dependent epitopes, allowing for the modulation of Sclerostin's biological activity and interaction with LRP5/6 receptors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional detection methods are used for sulfonation modifications, then general protein detection is possible, but specific identification of sulfonated versus unsulfonated forms is limited

Engineering Contradiction:

Improvedetection specificityVSAvoidsulfonation detection difficulty

Core Design Contradiction:

Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The patent develops antibodies with specificity tailored to local chemical characteristics - distinguishing between sulfonated and unsulfonated tyrosine residues at specific positions. This local quality approach allows the antibody to recognize subtle chemical differences (sulfonation status) at particular epitope locations while maintaining overall protein recognition capability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs detection methods that utilize signal changes (analogous to color changes in optical detection) to distinguish between sulfonated and unsulfonated forms. The antibodies produce detectable signals that differ based on the sulfonation state of the target protein, enabling precise measurement of modification status.

Inventive Principle:

Principle #32Color changes

2Adaptability or versatility

If antibodies are developed to recognize sulfonated epitopes, then specific therapeutic targeting is enabled, but the complexity of antibody development and characterization increases

Engineering Contradiction:

Improvetherapeutic targeting capabilityVSAvoidantibody development complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the antibody development process into distinct stages: identifying sulfonation sites through mass spectrometry, selecting epitopes that contain or are near these sites, and developing antibodies with specificities matched to these segmented targets. This segmentation makes the complex development process more manageable and systematic.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary characterization of sulfonation sites and epitope selection before full antibody development. By pre-identifying which tyrosine residues are sulfonated and which epitopes are most suitable for antibody targeting, the overall development complexity is reduced through advance planning and preparation.

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables the identification of sulfonation-dependent alterations in Sclerostin's binding affinity and biological activity, providing therapeutic opportunities for Sclerostin-related disorders by targeting specific sulfonation sites, thereby regulating bone mineral density and Wnt signaling pathways.

Implementation Method 1

Sulfonation of Tyrosines is believed to take place in about 1% of the Tyrosines in proteins... the enzymes, TPST-1 and TPST-2, responsible for sulfonation are localized in the Golgi apparatus

Methodology Applied

Scientific EffectSulfonation: Chemical Bonding

Implementation Method 2

the enzymes, TPST-1 and TPST-2, responsible for sulfonation are localized in the Golgi apparatus

Methodology Applied

Scientific EffectEnzyme catalysis: Enzyme

Implementation Method 3

antibodies that are specific for Sulfo-Tyr... Antibodies have been developed that can detect the presence of sulfonated Tyrosine residues

Methodology Applied

Scientific EffectAntibody-antigen binding:

Implementation Method 4

The two most popular methods for this type of analysis is the use of mass spectrometry (MS)... definitive answers on the presence of sulfonated Tyrosines can be achieved

Methodology Applied

Scientific EffectMass spectrometry:

Data Source

PatentUS11667703B2Sulfonated sclerostin, antibodies, epitopes and methods for identification and use therefor

Publication Date: 2023.06.06 ENZO BIOCHEM INC

AI summary

Provided are antibodies that bind to: a sulfonated epitope of the protein Sclerostin, to Sclerostin portions comprising a sulfonated amino acid and to dimerized forms of Sclerostin. Further provided are compositions and peptides comprising a sulfonated epitope of sclerostin. Also provided by this invention are methods for production of such antibodies, both active and passive, and methods for identifying antibodies specific for sulfonation sites in Sclerostin and other antibodies which discriminate between sulfonated and unsulfonated forms of sclerostin. Physical and virtual screening processes are provided in this invention for identifying compounds which disrupt or inhibit sulfonation and the interaction between Sclerostin and binding partners. The antibodies and compositions of the present invention are useful in diagnostic and therapeutic applications directed to Sclerostin-related disorders.