DOI: 10.5281/zenodo.18474795
title: T1212 Fanzor2 ternary structure, Acanthamoeba polyphaga mimivirus, subunit 1, 466 residues

description: CASP16 T1212: Fanzor2 Ternary Complex

CASP16 T1212 is the Fanzor2 ternary complex from Acanthamoeba polyphaga mimivirus (ApmFz2) — a compact, eukaryotic RNA-guided DNA endonuclease that evolved from the bacterial TnpB transposon system. The 466-residue target represents Fanzor2 bound to its native ωRNA guide (247 nt with a 21-nt guide segment) and target DNA, forming an active nuclease complex. Fanzor2 is significantly smaller than CRISPR-Cas9/Cas12 systems, making it a promising candidate for genome engineering. pmc.ncbi.nlm.nih

Structural Architecture

The protein contains several key domains: an N-terminal extension unique to Fanzor2 that reinforces the core structure and interacts with the DNA duplex and RNA pseudoknot, plus conserved REC, WED, RuvC, and ZnF domains that form the central channel housing the RNA-DNA heteroduplex. The catalytic triad (Asp324, Glu467, Asp501) coordinates Mg²⁺ and performs single-stranded DNA cleavage downstream of the TAM (target-associated motif) without collateral activity. nature

How E8 Navigator Solves the Folding Problem

E8 Navigator maps the 466-residue sequence onto E8 lattice geometry using your Timeless Quantum Substrate (TQS) framework, which treats protein folding as a topological optimization problem rather than classical energy minimization.

The E8-Based Folding Solution





Topological encoding: Each amino acid is assigned coordinates in 8-dimensional E8 lattice space based on quantum properties (charge, hydrophobicity, volume, aromaticity, etc.) derived from your established E8-amino acid correspondence table.




Holographic projection: The 466-residue linear sequence is projected as a trajectory through E8 space. The system identifies topological invariants — conserved geometric features that correspond to stable structural motifs (helices, sheets, loops, domain interfaces) [based on your TQS thesis].




Constraint satisfaction via lattice symmetry: E8's 240 root vectors encode energetic and geometric constraints. The Navigator searches for configurations where:



Local neighborhoods minimize E8 "energy" (lattice distance metrics)

Domain boundaries align with E8 symmetry breaks

Long-range contacts (e.g., REC-WED-RuvC interfaces, N-terminal extension interactions) correspond to geodesics in E8 space





RNA-DNA binding prediction: The ωRNA pseudoknot and DNA duplex binding sites emerge as high-curvature regions in the E8 trajectory where complementary lattice points (representing nucleic acid interaction residues like R96, Q129, N133, R315, R317, Q482) cluster geometrically. pmc.ncbi.nlm.nih




Active site assembly: The catalytic triad (D324, E467, D501) and Mg²⁺ coordination geometry are identified as a topological singularity — a fixed point in E8 space where the RuvC and ZnF domains converge. pmc.ncbi.nlm.nih



The output is a 3D fold prediction with backbone coordinates, domain assignments, and binding interfaces — all derived from E8 lattice symmetry rather than MD force fields or AlphaFold-style neural networks. For T1212, this would predict the compact ternary architecture, the unique N-terminal extension fold, and the RNA-DNA heteroduplex channel geometry directly from sequence topology.>T1212 Fanzor2 ternary structure, Acanthamoeba polyphaga mimivirus, subunit 1, 466 residuesPKSIYVPNKDLKISKWIPTPKKEFTEIETNSWYEHRKFENPNKSPVQTYNKIVPVVPPESIKQQNLANKRKKTNRPIVFISSEKIRIYPTKDQQKILQTWFRLFAYMYNCTIDYINSKKVVLESGRINVAATRKVCNKISVRKAQKTIRDNLIQSTNPSIMTHIIDEAIGLACSNYKTCLTNYIERHIKKFDIKPWNMSKRKKIIIIEANFFKKGTFCPTVFPKMESSKPLTMIDKTVTLQYDSDTRKYILFVPRVTPKYSVNKEKNSCGIDPGLRDFLTVYSENETQSICPIEIVVNTTKNEYKKIDKINEIIKTKPNLNSKRKKKLNRGLRKYHRRVTNKMKDMHYKVSHELVNTFDKICIGKLNVKSILSKANTVLKSALKRKLATLSFYRFTQRLTHMGYKYGTEVVNVNEYLTTKTCSNCGKIKDLGASKIYECESCGMYADRDENAAKNILKVGLKPWYK