N-Acetylgalactosaminide ?2,6-sialyltransferase II is a candidate enzyme for sialylation of galactose-deficient IgA1, the key autoantigen in IgA nephropathy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15110%2F15%3A33150000" target="_blank" >RIV/61989592:15110/15:33150000 - isvavai.cz</a>

Výsledek na webu

<a href="http://ndt.oxfordjournals.org/content/30/2/234.full.pdf+html" target="_blank" >http://ndt.oxfordjournals.org/content/30/2/234.full.pdf+html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/ndt/gfu308" target="_blank" >10.1093/ndt/gfu308</a>

Jazyk výsledku

angličtina

Název v původním jazyce

N-Acetylgalactosaminide ?2,6-sialyltransferase II is a candidate enzyme for sialylation of galactose-deficient IgA1, the key autoantigen in IgA nephropathy

Popis výsledku v původním jazyce

Galactose-deficient O-glycans in the hinge region (HR) of immunoglobulin A1 (IgA1) play a key role in the pathogenesis of IgA nephropathy (IgAN). O-Glycans of circulatory IgA1 consist of N-acetylgalactosamine (GalNAc) with a ?1,3-linked galactose; both sugars may be sialylated. In patients with IgAN, ?2,6-sialylated GalNAc is a frequent form of the galactose-deficient O-glycans. Prior analyses of IgA1-producing cells had indicated that ?2,6-sialyltransferase II (ST6GalNAc-II) is likely responsible for sialylation of GalNAc of galactose-deficient IgA1, but direct evidence is missing. METHODS: We produced a secreted variant of recombinant human ST6GalNAc-II and an IgA1 fragment comprised of C?1-HR-C?2. This IgA1 fragment and a synthetic HR peptide with enzymatically attached GalNAc residues served as acceptors. ST6GalNAc-II activity was assessed in vitro and the attachment of sialic acid to these acceptors was detected by lectin blot and mass spectrometry. RESULTS: ST6GalNAc-II was activ

Název v anglickém jazyce

N-Acetylgalactosaminide ?2,6-sialyltransferase II is a candidate enzyme for sialylation of galactose-deficient IgA1, the key autoantigen in IgA nephropathy

Popis výsledku anglicky

Galactose-deficient O-glycans in the hinge region (HR) of immunoglobulin A1 (IgA1) play a key role in the pathogenesis of IgA nephropathy (IgAN). O-Glycans of circulatory IgA1 consist of N-acetylgalactosamine (GalNAc) with a ?1,3-linked galactose; both sugars may be sialylated. In patients with IgAN, ?2,6-sialylated GalNAc is a frequent form of the galactose-deficient O-glycans. Prior analyses of IgA1-producing cells had indicated that ?2,6-sialyltransferase II (ST6GalNAc-II) is likely responsible for sialylation of GalNAc of galactose-deficient IgA1, but direct evidence is missing. METHODS: We produced a secreted variant of recombinant human ST6GalNAc-II and an IgA1 fragment comprised of C?1-HR-C?2. This IgA1 fragment and a synthetic HR peptide with enzymatically attached GalNAc residues served as acceptors. ST6GalNAc-II activity was assessed in vitro and the attachment of sialic acid to these acceptors was detected by lectin blot and mass spectrometry. RESULTS: ST6GalNAc-II was activ

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EC - Imunologie

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nephrology, Dialysis, Transplantation

ISSN

0931-0509

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

234-238

Kód UT WoS článku

000351660000013

EID výsledku v databázi Scopus

—