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Genome Annotation and Assembly

Genome Annotation and Assembly

The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.

Assembly of Cytoskeletal Filaments

Assembly of Cytoskeletal Filaments

Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...

Assembly of Complex Microtubule Structures

Assembly of Complex Microtubule Structures

Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.

Assembly of Signaling Complexes

Assembly of Signaling Complexes

Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...

Protein Complex Assembly

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...

C4 Pathway and CAM

C4 Pathway and CAM

Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...

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Related Experiment Video

Updated: Jun 2, 2025

Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities

Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities

Published on: January 6, 2023

Assembly Graph as the Rosetta Stone of Ecological Assembly.

Chuliang Song¹

¹Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California, USA.

Environmental Microbiology

|January 13, 2025

Summary

Ecological assembly graphs unify theoretical approaches to community formation. This visual tool connects dynamical, informational, and probabilistic theories, aiding empirical research and predictive ecological understanding.

Keywords:

assembly graph ecological assembly priority effect species invasion

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Area of Science:

Ecology
Theoretical Ecology
Community Ecology

Background:

Ecological assembly theories, including dynamical, informational, and probabilistic approaches, have advanced but lack a unifying framework.
Current theories are often inaccessible to non-theoreticians, hindering broader application and understanding.

Purpose of the Study:

Introduce the assembly graph as an integrative tool to connect diverse theoretical approaches in ecological assembly.
Provide a unifying lens to make complex ecological assembly theories more accessible and applicable.

Main Methods:

Review theoretical advancements in ecological assembly through the framework of assembly graphs.
Illustrate how assembly graphs visually represent assembly dynamics, with nodes as species combinations and edges as introduction-driven transitions.
Discuss the application of assembly graphs to informational, dynamical, and probabilistic approaches to ecological assembly.

Main Results:

Assembly graphs visually represent ecological assembly dynamics, connecting species combinations and introduction events.
The assembly graph framework facilitates understanding how ecological processes reduce uncertainty, ensure species coexistence, and constrain model dynamics.
Methods for decomposing complex graphs and computational tools for empirical derivation are reviewed, enabling practical application.

Conclusions:

The assembly graph serves as a unifying and accessible tool for understanding ecological assembly.
This integrative approach aims to bridge theoretical advancements with empirical research, fostering a predictive understanding of community formation.