TDRD10

Model summary

A cytoplasmic RNA-binding factor that concentrates in germline ribonucleoprotein granules. It uses an N-terminal RNA-recognition module to capture target RNAs and a C-terminal methyl-mark reader to recruit partner proteins, thereby assembling higher-order complexes that govern post-transcriptional control. By coupling RNA engagement with multivalent protein interactions, it organizes cytoplasmic granules that coordinate RNA processing, storage, and regulated translation within germ-cell ribonucleoprotein assemblies.

Predicted Gene Ontology terms

1. 01

   I begin with the InterPro architecture.

   The N-terminal half is densely packed with RNA-binding signatures: IPR012677 (Nucleotide-binding alpha-beta plait domain superfamily, residues 29–108) and IPR035979 (RNA-binding domain superfamily, residues 30–113) define a canonical β-α-β plait scaffold that supports nucleic acid recognition. Within this scaffold sits IPR000504 (RNA recognition motif domain, residues 34–107), the archetypal RRM that forms an antiparallel β-sheet surface for single-stranded RNA capture. This RRM is further specified by IPR047385 (Tudor domain-containing protein 10, RNA recognition motif, residues 35–103), indicating an RRM variant tailored to the Tudor-domain-containing protein family. The C-terminal half introduces IPR002999 (Tudor domain, residues 209–316), a methyl-lysine/arginine reader module that organizes ribonucleoprotein assemblies by recognizing symmetrically or asymmetrically methylated arginine/lysine motifs on partner proteins. The overall composition is reinforced by IPR050502 (Eukaryotic RNA-binding family, residues 27–117), which consolidates the identity as a eukaryotic RNA-binding factor. The ordered layout—an N-terminal RRM core followed by a C-terminal Tudor reader—creates a bipartite module: the RRM confers direct RNA affinity and specificity, while the Tudor domain recruits methyl-marked protein partners to build higher-order RNP complexes.

2. 02

   This architecture dictates molecular function.

   The RRM-centered core causes high-affinity RNA engagement and assembly of ribonucleoprotein particles, while the Tudor domain supplies avidity and selectivity through protein–protein readout of methyl marks. Together, these features enforce a primary molecular function of multivalent macromolecular association, consistent with GO:0005515 protein binding, and strongly coupled to RNA handling.

3. 03

   From function to process, an RRM-Tudor tandem is a hallmark of post-transcriptional regulators.

   By binding RNA and docking methyl-marked RNP factors, the protein organizes steps of mRNA maturation, surveillance, storage, and translation control. This causal chain—direct RNA capture plus Tudor-mediated network assembly—places the protein squarely in GO:0006396 RNA processing.

4. 04

   Cellular context follows from the assembly logic.

   Tudor-reader modules and RRMs frequently nucleate cytoplasmic ribonucleoprotein condensates. The presence of a Tudor domain that recognizes methylated partners, together with an RNA-binding core, drives partitioning into germline ribonucleoprotein granules known as P granules. This supports localization to GO:0043186 P granule and explains the observed cytoplasmic enrichment.

5. 05

   Mechanistically, I hypothesize that the RRM binds target mRNAs and small noncoding RNAs, while the Tudor domain recruits methylated RNP adaptors to form stable assemblies in P granules.

   Likely partners include arginine-methylated RNA-binding proteins and translational regulators that seed germ-cell granules. Through these interactions, the complex modulates mRNA fate—storage, repression, and timely activation—linking RNA processing to cytoplasmic granule dynamics.