6J60

hnRNP A1 reversible amyloid core GFGGNDNFG (residues 209-217)

Summary for 6J60

• Entry DOI: 10.2210/pdb6j60/pdb
• Descriptor: 9-mer peptide (GFGGNDNFG) from Heterogeneous nuclear ribonucleoprotein A1 (2 entities in total)
• Functional Keywords: phase separation, reversibility, rna binding protein, microed
• Biological source: Homo sapiens
• Total number of polymer chains: 1
• Total formula weight: 883.86

Authors

Luo, F.,Zhou, H.,Gui, X.,Li, D.,Li, X.,Liu, C. (deposition date: 2019-01-12, release date: 2019-04-03, Last modification date: 2024-03-27)

Primary citation

Gui, X.,Luo, F.,Li, Y.,Zhou, H.,Qin, Z.,Liu, Z.,Gu, J.,Xie, M.,Zhao, K.,Dai, B.,Shin, W.S.,He, J.,He, L.,Jiang, L.,Zhao, M.,Sun, B.,Li, X.,Liu, C.,Li, D.
Structural basis for reversible amyloids of hnRNPA1 elucidates their role in stress granule assembly.
Nat Commun, 10:2006-2006, 2019

PubMed Abstract: Subcellular membrane-less organelles consist of proteins with low complexity domains. Many of them, such as hnRNPA1, can assemble into both a polydisperse liquid phase and an ordered solid phase of amyloid fibril. The former mirrors biological granule assembly, while the latter is usually associated with neurodegenerative disease. Here, we observe a reversible amyloid formation of hnRNPA1 that synchronizes with liquid-liquid phase separation, regulates the fluidity and mobility of the liquid-like droplets, and facilitates the recruitment of hnRNPA1 into stress granules. We identify the reversible amyloid-forming cores of hnRNPA1 (named hnRACs). The atomic structures of hnRACs reveal a distinct feature of stacking Asp residues, which contributes to fibril reversibility and explains the irreversible pathological fibril formation caused by the Asp mutations identified in familial ALS. Our work characterizes the structural diversity and heterogeneity of reversible amyloid fibrils and illuminates the biological function of reversible amyloid formation in protein phase separation.

PubMed: 31043593
DOI: 10.1038/s41467-019-09902-7

Experimental method

ELECTRON CRYSTALLOGRAPHY (0.96 Å)