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Solution structure of the catalytic domain of RICH protein from goldfish.

Kozlov G, Denisov AY, Pomerantseva E, Gravel M, Braun PE, Gehring K
FEBS J 274 1600-9 (2007)
Cited: 11 times
EuropePMC logo PMID: 17480208

Abstract

Regeneration-induced CNPase homolog (RICH) is an axonal growth-associated protein, which is induced in teleost fish upon optical nerve injury. RICH consists of a highly acidic N-terminal domain, a catalytic domain with 2',3'-cyclic nucleotide 3'-phosphodiesterase (CNPase) activity and a C-terminal isoprenylation site. In vitro RICH and mammalian brain CNPase specifically catalyze the hydrolysis of 2',3'-cyclic nucleotides to produce 2'-nucleotides, but the physiologically relevant in vivo substrate remains unknown. Here, we report the NMR structure of the catalytic domain of goldfish RICH and describe its binding to CNPase inhibitors. The structure consists of a twisted nine-stranded antiparallel beta-sheet surrounded by alpha-helices on both sides. Despite significant local differences mostly arising from a seven-residue insert in the RICH sequence, the active site region is highly similar to that of human CNPase. Likewise, refinement of the catalytic domain of rat CNPase using residual dipolar couplings gave improved agreement with the published crystal structure. NMR titrations of RICH with inhibitors point to a similar catalytic mechanism for RICH and CNPase. The results suggest a functional importance for the evolutionarily conserved phosphodiesterase activity and hint of a link with pre-tRNA splicing.

Articles - 2ilx mentioned but not cited (1)

  1. Myelin 2',3'-cyclic nucleotide 3'-phosphodiesterase: active-site ligand binding and molecular conformation. Myllykoski M, Raasakka A, Han H, Kursula P. PLoS One 7 e32336 (2012)


Reviews citing this publication (2)

  1. The myelin membrane-associated enzyme 2',3'-cyclic nucleotide 3'-phosphodiesterase: on a highway to structure and function. Raasakka A, Kursula P. Neurosci Bull 30 956-966 (2014)
  2. Structural and functional evolution of 2',3'-cyclic nucleotide 3'-phosphodiesterase. Myllykoski M, Seidel L, Muruganandam G, Raasakka A, Torda AE, Kursula P. Brain Res 1641 64-78 (2016)

Articles citing this publication (8)



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