Purification and characterization of a second type of neutral ceramidase from rat brain

A second more hydrophobic form of rat brain ceramidase

Faisal Thayyullathil, Shahanas Chathoth, Abdulkader Hago, Mahendra Patel, Zdzislaw M. Szulc, Yusuf Hannun, Sehamuddin Galadari

Research output: Contribution to journalArticle

Abstract

Ceramidases (CDase) are enzymes that catalyze the hydrolysis of N-acyl linkage of ceramide (Cer) to generate sphingosine and free fatty acids. In this study we report the purification and characterization of a novel second type of neutral ceramidase from rat brain (RBCDase II). Triton X-100 protein extract from rat brain membrane was purified sequentially using Q-Sepharose, HiLoad16/60 Superdex 200 pg, heparin-Sepharose, phenyl-Sepharose HP, and Mono Q columns. After Mono Q, the specific activity of the enzyme increased by ~ 15,000-fold over that of the rat brain homogenate. This enzyme has pH optima of 7.5, and it has a larger apparent molecular weight (110 kDa) than the previously purified (90 kDa) and characterized neutral rat brain CDase (RBCDase I). De-glycosylation experiments show that the differences in molecular mass of RBCDase I and II on SDS-PAGE are not due to the heterogeneity with N-glycan. RBCDase II is partially stimulated by Ca2+ and is inhibited by pyrimidine mono nucleotides such as TMP and UMP. This finding is significant as it demonstrates for the first time an effect by nucleotides on a CDase activity. The enzyme was also inhibited by both oxidized and reduced GSH. The effects of metal ions were examined, and we found that the enzyme is very sensitive to Hg2+ and Fe3+, while it is not affected by Mn2+. EDTA was somewhat inhibitory at a 20 mM concentration.

Original languageEnglish (US)
Pages (from-to)242-252
Number of pages11
JournalBiochimica et Biophysica Acta - Molecular and Cell Biology of Lipids
Volume1811
Issue number4
DOIs
StatePublished - Apr 1 2011

Fingerprint

Neutral Ceramidase
Ceramidases
Brain
Enzymes
Pyrimidine Nucleotides
Thymidine Monophosphate
Uridine Monophosphate
Sphingosine
Ceramides
Octoxynol
Glycosylation
Nonesterified Fatty Acids
Edetic Acid
Sepharose
Polysaccharides
Polyacrylamide Gel Electrophoresis
Hydrolysis
Nucleotides
Molecular Weight
Metals

Keywords

  • Ceramidase
  • Ceramide
  • Chromatography
  • Glycosidase F
  • Sphingosine

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

Cite this

Purification and characterization of a second type of neutral ceramidase from rat brain : A second more hydrophobic form of rat brain ceramidase. / Thayyullathil, Faisal; Chathoth, Shahanas; Hago, Abdulkader; Patel, Mahendra; Szulc, Zdzislaw M.; Hannun, Yusuf; Galadari, Sehamuddin.

In: Biochimica et Biophysica Acta - Molecular and Cell Biology of Lipids, Vol. 1811, No. 4, 01.04.2011, p. 242-252.

Research output: Contribution to journalArticle

Thayyullathil, Faisal ; Chathoth, Shahanas ; Hago, Abdulkader ; Patel, Mahendra ; Szulc, Zdzislaw M. ; Hannun, Yusuf ; Galadari, Sehamuddin. / Purification and characterization of a second type of neutral ceramidase from rat brain : A second more hydrophobic form of rat brain ceramidase. In: Biochimica et Biophysica Acta - Molecular and Cell Biology of Lipids. 2011 ; Vol. 1811, No. 4. pp. 242-252.
@article{d227777098b44f7bb2f9edab556efefe,
title = "Purification and characterization of a second type of neutral ceramidase from rat brain: A second more hydrophobic form of rat brain ceramidase",
abstract = "Ceramidases (CDase) are enzymes that catalyze the hydrolysis of N-acyl linkage of ceramide (Cer) to generate sphingosine and free fatty acids. In this study we report the purification and characterization of a novel second type of neutral ceramidase from rat brain (RBCDase II). Triton X-100 protein extract from rat brain membrane was purified sequentially using Q-Sepharose, HiLoad16/60 Superdex 200 pg, heparin-Sepharose, phenyl-Sepharose HP, and Mono Q columns. After Mono Q, the specific activity of the enzyme increased by ~ 15,000-fold over that of the rat brain homogenate. This enzyme has pH optima of 7.5, and it has a larger apparent molecular weight (110 kDa) than the previously purified (90 kDa) and characterized neutral rat brain CDase (RBCDase I). De-glycosylation experiments show that the differences in molecular mass of RBCDase I and II on SDS-PAGE are not due to the heterogeneity with N-glycan. RBCDase II is partially stimulated by Ca2+ and is inhibited by pyrimidine mono nucleotides such as TMP and UMP. This finding is significant as it demonstrates for the first time an effect by nucleotides on a CDase activity. The enzyme was also inhibited by both oxidized and reduced GSH. The effects of metal ions were examined, and we found that the enzyme is very sensitive to Hg2+ and Fe3+, while it is not affected by Mn2+. EDTA was somewhat inhibitory at a 20 mM concentration.",
keywords = "Ceramidase, Ceramide, Chromatography, Glycosidase F, Sphingosine",
author = "Faisal Thayyullathil and Shahanas Chathoth and Abdulkader Hago and Mahendra Patel and Szulc, {Zdzislaw M.} and Yusuf Hannun and Sehamuddin Galadari",
year = "2011",
month = "4",
day = "1",
doi = "10.1016/j.bbalip.2010.12.012",
language = "English (US)",
volume = "1811",
pages = "242--252",
journal = "Biochimica et Biophysica Acta - Molecular and Cell Biology of Lipids",
issn = "1388-1981",
publisher = "Elsevier",
number = "4",

}

TY - JOUR

T1 - Purification and characterization of a second type of neutral ceramidase from rat brain

T2 - A second more hydrophobic form of rat brain ceramidase

AU - Thayyullathil, Faisal

AU - Chathoth, Shahanas

AU - Hago, Abdulkader

AU - Patel, Mahendra

AU - Szulc, Zdzislaw M.

AU - Hannun, Yusuf

AU - Galadari, Sehamuddin

PY - 2011/4/1

Y1 - 2011/4/1

N2 - Ceramidases (CDase) are enzymes that catalyze the hydrolysis of N-acyl linkage of ceramide (Cer) to generate sphingosine and free fatty acids. In this study we report the purification and characterization of a novel second type of neutral ceramidase from rat brain (RBCDase II). Triton X-100 protein extract from rat brain membrane was purified sequentially using Q-Sepharose, HiLoad16/60 Superdex 200 pg, heparin-Sepharose, phenyl-Sepharose HP, and Mono Q columns. After Mono Q, the specific activity of the enzyme increased by ~ 15,000-fold over that of the rat brain homogenate. This enzyme has pH optima of 7.5, and it has a larger apparent molecular weight (110 kDa) than the previously purified (90 kDa) and characterized neutral rat brain CDase (RBCDase I). De-glycosylation experiments show that the differences in molecular mass of RBCDase I and II on SDS-PAGE are not due to the heterogeneity with N-glycan. RBCDase II is partially stimulated by Ca2+ and is inhibited by pyrimidine mono nucleotides such as TMP and UMP. This finding is significant as it demonstrates for the first time an effect by nucleotides on a CDase activity. The enzyme was also inhibited by both oxidized and reduced GSH. The effects of metal ions were examined, and we found that the enzyme is very sensitive to Hg2+ and Fe3+, while it is not affected by Mn2+. EDTA was somewhat inhibitory at a 20 mM concentration.

AB - Ceramidases (CDase) are enzymes that catalyze the hydrolysis of N-acyl linkage of ceramide (Cer) to generate sphingosine and free fatty acids. In this study we report the purification and characterization of a novel second type of neutral ceramidase from rat brain (RBCDase II). Triton X-100 protein extract from rat brain membrane was purified sequentially using Q-Sepharose, HiLoad16/60 Superdex 200 pg, heparin-Sepharose, phenyl-Sepharose HP, and Mono Q columns. After Mono Q, the specific activity of the enzyme increased by ~ 15,000-fold over that of the rat brain homogenate. This enzyme has pH optima of 7.5, and it has a larger apparent molecular weight (110 kDa) than the previously purified (90 kDa) and characterized neutral rat brain CDase (RBCDase I). De-glycosylation experiments show that the differences in molecular mass of RBCDase I and II on SDS-PAGE are not due to the heterogeneity with N-glycan. RBCDase II is partially stimulated by Ca2+ and is inhibited by pyrimidine mono nucleotides such as TMP and UMP. This finding is significant as it demonstrates for the first time an effect by nucleotides on a CDase activity. The enzyme was also inhibited by both oxidized and reduced GSH. The effects of metal ions were examined, and we found that the enzyme is very sensitive to Hg2+ and Fe3+, while it is not affected by Mn2+. EDTA was somewhat inhibitory at a 20 mM concentration.

KW - Ceramidase

KW - Ceramide

KW - Chromatography

KW - Glycosidase F

KW - Sphingosine

UR - http://www.scopus.com/inward/record.url?scp=79551617173&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79551617173&partnerID=8YFLogxK

U2 - 10.1016/j.bbalip.2010.12.012

DO - 10.1016/j.bbalip.2010.12.012

M3 - Article

VL - 1811

SP - 242

EP - 252

JO - Biochimica et Biophysica Acta - Molecular and Cell Biology of Lipids

JF - Biochimica et Biophysica Acta - Molecular and Cell Biology of Lipids

SN - 1388-1981

IS - 4

ER -