LIP1/YMR298W Summary Help

Standard Name LIP1 1
Systematic Name YMR298W
Feature Type ORF, Verified
Description Ceramide synthase subunit; single-span ER membrane protein associated with Lag1p and Lac1p and required for ceramide synthase activity, null mutant grows extremely slowly and is defective in ceramide synthesis (1 and see Summary Paragraph)
Name Description Lag1p/Lac1p Interacting Protein 1
Chromosomal Location
ChrXIII:863819 to 864271 | ORF Map | GBrowse
Gbrowse
Gene Ontology Annotations All LIP1 GO evidence and references
  View Computational GO annotations for LIP1
Molecular Function
Manually curated
Biological Process
Manually curated
Cellular Component
Manually curated
High-throughput
Regulators 3 genes
Resources
Pathways
Classical genetics
null
Large-scale survey
conditional
null
overexpression
reduction of function
Resources
37 total interaction(s) for 25 unique genes/features.
Physical Interactions
  • Affinity Capture-RNA: 1
  • Affinity Capture-Western: 6
  • Co-fractionation: 1
  • Two-hybrid: 6

Genetic Interactions
  • Negative Genetic: 9
  • Phenotypic Enhancement: 1
  • Positive Genetic: 8
  • Synthetic Growth Defect: 3
  • Synthetic Lethality: 2

Resources
Expression Summary
histogram
Resources
Length (a.a.) 150
Molecular Weight (Da) 17,207
Isoelectric Point (pI) 6.65
Localization
Phosphorylation PhosphoGRID | PhosphoPep Database
Structure
Homologs
sequence information
ChrXIII:863819 to 864271 | ORF Map | GBrowse
SGD ORF map
Last Update Coordinates: 2011-02-03 | Sequence: 1996-07-31
Subfeature details
Relative
Coordinates
Chromosomal
Coordinates
Most Recent Updates
Coordinates Sequence
CDS 1..453 863819..864271 2011-02-03 1996-07-31
Retrieve sequences
Analyze Sequence
S288C only
S288C vs. other species
S288C vs. other strains
Resources
External Links All Associated Seq | Entrez Gene | Entrez RefSeq Protein | MIPS | Search all NCBI (Entrez) | UniProtKB
Primary SGDIDS000004913
SUMMARY PARAGRAPH for LIP1

About sphingolipid metabolism

Sphingolipids are essential components of the plasma membrane in all eukaryotic cells. S. cerevisiae cells make three complex sphingolipids: inositol-phosphoceramide (IPC), mannose-inositol-phosphoceramide (MIPC), and mannose-(inositol phosphate)2-ceramide (M(IP)2C)(2). In the yeast plasma membrane sphingolipids concentrate with ergosterol to form lipid rafts, specialized membrane microdomains implicated in a variety of cellular processes, including sorting of membrane proteins and lipids, as well as organizing and regulating signaling cascades (3). Intermediates in sphingolipid biosynthesis have been shown to play important roles as signaling molecules and growth regulators. Sphingolipid long chain bases (LCBs), dihydrosphingosine (DHS) and phytosphingosine (PHS), have been implicated as secondary messengers in signaling pathways that regulate the heat stress response (4, 5). Other intermediates, phytoceramide and long-chain base phosphates (LCBPs), have been shown to be components of the tightly-controlled ceramide/LCBP rheostat, which regulates cell growth (6). Since phosphoinositol-containing sphingolipids are unique to fungi, the sphingolipid biosynthesis pathway is considered a target for antifungal drugs (7, 8).

Last updated: 2007-10-05 Contact SGD

References cited on this page View Complete Literature Guide for LIP1
1) Vallee B and Riezman H  (2005) Lip1p: a novel subunit of acyl-CoA ceramide synthase. EMBO J 24(4):730-41
2) Dickson RC and Lester RL  (2002) Sphingolipid functions in Saccharomyces cerevisiae. Biochim Biophys Acta 1583(1):13-25
3) Bagnat M and Simons K  (2002) Lipid rafts in protein sorting and cell polarity in budding yeast Saccharomyces cerevisiae. Biol Chem 383(10):1475-80
4) Jenkins GM, et al.  (1997) Involvement of yeast sphingolipids in the heat stress response of Saccharomyces cerevisiae. J Biol Chem 272(51):32566-72
5) Ferguson-Yankey SR, et al.  (2002) Mutant analysis reveals complex regulation of sphingolipid long chain base phosphates and long chain bases during heat stress in yeast. Yeast 19(7):573-86
6) Kobayashi SD and Nagiec MM  (2003) Ceramide/long-chain base phosphate rheostat in Saccharomyces cerevisiae: regulation of ceramide synthesis by Elo3p and Cka2p. Eukaryot Cell 2(2):284-94
7) Nagiec MM, et al.  (1997) Sphingolipid synthesis as a target for antifungal drugs. Complementation of the inositol phosphorylceramide synthase defect in a mutant strain of Saccharomyces cerevisiae by the AUR1 gene. J Biol Chem 272(15):9809-17
8) Sugimoto Y, et al.  (2004) IPC synthase as a useful target for antifungal drugs. Curr Drug Targets Infect Disord 4(4):311-22