MiniSINEUP RNA Stem-Loop Structures Enhance Translation
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Solution Overview
Problem
Current methods for delivering SINEUP RNA molecules are inefficient due to their instability and length, making it challenging to exploit their potential in therapeutic and research applications, particularly in enhancing protein translation.
Innovation Solution
Designing miniSINEUP molecules with a binding domain and a spacer sequence, along with a shorter effector domain derived from SINE B2 elements, which form specific stem-loop and internal loop structures, to enhance translation up-regulation while maintaining stability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full-length SINEUP RNA molecules are used, then translation up-regulation activity is achieved, but delivery efficiency and stability are poor due to length and structural complexity
Solution Approach 1:
The patent extracts only the essential effector domain (SINE B2 element) from the full-length SINEUP RNA molecule, creating a miniSINEUP that retains translation up-regulation activity while removing non-essential sequences that hinder delivery and stability. This extraction principle directly resolves the contradiction by separating functional core from problematic bulk.
Solution Approach 2:
The patent segments the SINEUP RNA into distinct functional domains: a binding domain for target recognition and a compressed effector domain for translation enhancement. This segmentation allows optimization of each domain independently, enabling the effector domain to be shortened while preserving overall function.
2Reliability
If full-length SINEUP RNA molecules are used, then translation up-regulation activity is achieved, but molecular stability is poor
Solution Approach 1:
By extracting only the essential SINE B2 effector domain and excluding non-essential flanking sequences from the full-length SINEUP, the patent creates a more stable miniSINEUP molecule. The removal of unnecessary sequences reduces susceptibility to degradation while preserving the stable stem-loop structure essential for function.
3Productivity
If the effector domain is shortened, then delivery efficiency and stability improve, but translation up-regulation potency may be reduced
Solution Approach 1:
The patent carefully extracts only the critical SINE B2 core sequences required for effector function, preserving the essential stem-loop structure while removing non-essential regions. This selective extraction maintains translation up-regulation potency despite overall size reduction.
Solution Approach 2:
The patent applies local quality by concentrating functional elements within the compressed effector domain, ensuring that the shortened sequence retains high local concentration of translation-enhancing motifs while reducing overall molecular length for improved delivery.
Data Source
AI summary
There are disclosed functional nucleic acid molecules comprising a target binding sequence comprising a sequence reverse complementary to a target mRNA sequence for which protein translation is to be enhanced; and a regulatory sequence having two-dimensional structures comprising specific stem-loop and internal loop domains and displaying translation enhancing efficiency.