# Structural alignment software ## Links (Wikipedia order) <!-- injected from _registry/childlinks/Structural_alignment_software.json (2026-07-30T02:09:12Z) --> `Molecular_Operating_Environment` · `Protein_Data_Bank` · `PyMOL` · `Structural_alignment` · `UCSF_Chimera` > Summary stub · part of Systems Engineering · [Wikipedia source](https://en.wikipedia.org/wiki/Structural_alignment_software) ## Summary Structural alignment software is a compilation of tools and web portals used for pairwise or multiple structural comparison and alignment of macromolecules, especially proteins. Unlike [[Sequence|sequence]] alignment, structural alignment superimposes three-dimensional shapes to detect homology and functional similarity that sequence alone may miss. Such tools are central to structural [[Bioinformatics|bioinformatics]] and to understanding evolutionary and functional relationships. They range from interactive web servers to downloadable programs. ## Key points - Tools for pairwise and multiple structural comparison - Superimposes 3D macromolecular shapes - Detects similarity that sequence alignment can miss - Central to structural bioinformatics - Includes web servers and downloadable programs ## Relation to Systems Engineering This is a specialized scientific-software category illustrating how domain tools are catalogued; a systems view integrates such tools into research workflows. ## Sources - [Structural alignment software — Wikipedia](https://en.wikipedia.org/wiki/Structural_alignment_software) Back to Systems Engineering --- <!-- SEMIOTIC-PROFILE:START --> ## Semiotic profile > *The semiotic universals this article invokes, machine-derived from the crossref — **unverified** (born so). Populated 2026-07-06 for the Systems room.* **Universals (2):** 🟡 system (6) · 🟡 sequence (4) **Enter by sign:** Systems Semiotic Gateway · Alphabetum · Icon Registry · ← Systems Portal <!-- SEMIOTIC-PROFILE:END --> ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Structural_alignment_software) : [Wikitube](https://en.wikitube.io/wiki/Structural_alignment_software) ## Previous hub tags Tree parent: [[Systems_engineering]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*