Fatty acid-binding protein, intestinal


Fatty acid-binding protein, intestinal
  • Fatty acid-binding protein 2
  • I-FABP
  • Intestinal-type fatty acid-binding protein
Gene Name
Amino acid sequence
>lcl|BSEQ0012494|Fatty acid-binding protein, intestinal
Number of residues
Molecular Weight
Theoretical pI
GO Classification
fatty acid binding / transporter activity
digestion / small molecule metabolic process / triglyceride catabolic process
General Function
Transporter activity
Specific Function
FABP are thought to play a role in the intracellular transport of long-chain fatty acids and their acyl-CoA esters. FABP2 is probably involved in triglyceride-rich lipoprotein synthesis. Binds saturated long-chain fatty acids with a high affinity, but binds with a lower affinity to unsaturated long-chain fatty acids. FABP2 may also help maintain energy homeostasis by functioning as a lipid sensor.
Pfam Domain Function
Transmembrane Regions
Not Available
Cellular Location
Gene sequence
>lcl|BSEQ0012495|Fatty acid-binding protein, intestinal (FABP2)
Chromosome Location
External Identifiers
UniProtKB IDP12104
GenBank Protein ID46854681
GenBank Gene IDBC069466
General References
  1. Sweetser DA, Birkenmeier EH, Klisak IJ, Zollman S, Sparkes RS, Mohandas T, Lusis AJ, Gordon JI: The human and rodent intestinal fatty acid binding protein genes. A comparative analysis of their structure, expression, and linkage relationships. J Biol Chem. 1987 Nov 25;262(33):16060-71. [Article]
  2. Hillier LW, Graves TA, Fulton RS, Fulton LA, Pepin KH, Minx P, Wagner-McPherson C, Layman D, Wylie K, Sekhon M, Becker MC, Fewell GA, Delehaunty KD, Miner TL, Nash WE, Kremitzki C, Oddy L, Du H, Sun H, Bradshaw-Cordum H, Ali J, Carter J, Cordes M, Harris A, Isak A, van Brunt A, Nguyen C, Du F, Courtney L, Kalicki J, Ozersky P, Abbott S, Armstrong J, Belter EA, Caruso L, Cedroni M, Cotton M, Davidson T, Desai A, Elliott G, Erb T, Fronick C, Gaige T, Haakenson W, Haglund K, Holmes A, Harkins R, Kim K, Kruchowski SS, Strong CM, Grewal N, Goyea E, Hou S, Levy A, Martinka S, Mead K, McLellan MD, Meyer R, Randall-Maher J, Tomlinson C, Dauphin-Kohlberg S, Kozlowicz-Reilly A, Shah N, Swearengen-Shahid S, Snider J, Strong JT, Thompson J, Yoakum M, Leonard S, Pearman C, Trani L, Radionenko M, Waligorski JE, Wang C, Rock SM, Tin-Wollam AM, Maupin R, Latreille P, Wendl MC, Yang SP, Pohl C, Wallis JW, Spieth J, Bieri TA, Berkowicz N, Nelson JO, Osborne J, Ding L, Meyer R, Sabo A, Shotland Y, Sinha P, Wohldmann PE, Cook LL, Hickenbotham MT, Eldred J, Williams D, Jones TA, She X, Ciccarelli FD, Izaurralde E, Taylor J, Schmutz J, Myers RM, Cox DR, Huang X, McPherson JD, Mardis ER, Clifton SW, Warren WC, Chinwalla AT, Eddy SR, Marra MA, Ovcharenko I, Furey TS, Miller W, Eichler EE, Bork P, Suyama M, Torrents D, Waterston RH, Wilson RK: Generation and annotation of the DNA sequences of human chromosomes 2 and 4. Nature. 2005 Apr 7;434(7034):724-31. [Article]
  3. Gerhard DS, Wagner L, Feingold EA, Shenmen CM, Grouse LH, Schuler G, Klein SL, Old S, Rasooly R, Good P, Guyer M, Peck AM, Derge JG, Lipman D, Collins FS, Jang W, Sherry S, Feolo M, Misquitta L, Lee E, Rotmistrovsky K, Greenhut SF, Schaefer CF, Buetow K, Bonner TI, Haussler D, Kent J, Kiekhaus M, Furey T, Brent M, Prange C, Schreiber K, Shapiro N, Bhat NK, Hopkins RF, Hsie F, Driscoll T, Soares MB, Casavant TL, Scheetz TE, Brown-stein MJ, Usdin TB, Toshiyuki S, Carninci P, Piao Y, Dudekula DB, Ko MS, Kawakami K, Suzuki Y, Sugano S, Gruber CE, Smith MR, Simmons B, Moore T, Waterman R, Johnson SL, Ruan Y, Wei CL, Mathavan S, Gunaratne PH, Wu J, Garcia AM, Hulyk SW, Fuh E, Yuan Y, Sneed A, Kowis C, Hodgson A, Muzny DM, McPherson J, Gibbs RA, Fahey J, Helton E, Ketteman M, Madan A, Rodrigues S, Sanchez A, Whiting M, Madari A, Young AC, Wetherby KD, Granite SJ, Kwong PN, Brinkley CP, Pearson RL, Bouffard GG, Blakesly RW, Green ED, Dickson MC, Rodriguez AC, Grimwood J, Schmutz J, Myers RM, Butterfield YS, Griffith M, Griffith OL, Krzywinski MI, Liao N, Morin R, Palmquist D, Petrescu AS, Skalska U, Smailus DE, Stott JM, Schnerch A, Schein JE, Jones SJ, Holt RA, Baross A, Marra MA, Clifton S, Makowski KA, Bosak S, Malek J: The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). Genome Res. 2004 Oct;14(10B):2121-7. [Article]
  4. Pelsers MM, Namiot Z, Kisielewski W, Namiot A, Januszkiewicz M, Hermens WT, Glatz JF: Intestinal-type and liver-type fatty acid-binding protein in the intestine. Tissue distribution and clinical utility. Clin Biochem. 2003 Oct;36(7):529-35. [Article]
  5. Darimont C, Gradoux N, de Pover A: Epidermal growth factor regulates fatty acid uptake and metabolism in Caco-2 cells. Am J Physiol. 1999 Mar;276(3 Pt 1):G606-12. [Article]
  6. Rajabzadeh M, Kao J, Frieden C: Consequences of single-site mutations in the intestinal fatty acid binding protein. Biochemistry. 2003 Oct 28;42(42):12192-9. [Article]
  7. Zhang F, Lucke C, Baier LJ, Sacchettini JC, Hamilton JA: Solution structure of human intestinal fatty acid binding protein: implications for ligand entry and exit. J Biomol NMR. 1997 Apr;9(3):213-28. [Article]
  8. Zhang F, Lucke C, Baier LJ, Sacchettini JC, Hamilton JA: Solution structure of human intestinal fatty acid binding protein with a naturally-occurring single amino acid substitution (A54T) that is associated with altered lipid metabolism. Biochemistry. 2003 Jun 24;42(24):7339-47. [Article]
  9. Baier LJ, Sacchettini JC, Knowler WC, Eads J, Paolisso G, Tataranni PA, Mochizuki H, Bennett PH, Bogardus C, Prochazka M: An amino acid substitution in the human intestinal fatty acid binding protein is associated with increased fatty acid binding, increased fat oxidation, and insulin resistance. J Clin Invest. 1995 Mar;95(3):1281-7. [Article]
  10. Kunsan X, Taisan Z, Weiping J, Duoqi S, Wei D, Jie L, Junxi L, Rong Z: The association of Ala54Thr variant of intestinal fatty acid binding protein gene with general and regional adipose tissue depots. Chin Med Sci J. 1999 Mar;14(1):46-51. [Article]

Drug Relations

Drug Relations
DrugBank IDNameDrug groupPharmacological action?ActionsDetails
DB03796Palmitic AcidapprovedunknownDetails
DB04557Arachidonic AcidexperimentalnoDetails
DB00783Estradiolapproved, investigational, vet_approvednobinderDetails
DB08231Myristic acidexperimentalunknownDetails
DB09213Dexibuprofenapproved, investigationalunknownbinderDetails
DB13952Estradiol acetateapproved, investigational, vet_approvednoDetails
DB13953Estradiol benzoateapproved, investigational, vet_approvednoDetails
DB13954Estradiol cypionateapproved, investigational, vet_approvednoDetails
DB13955Estradiol dienanthateapproved, investigational, vet_approvednoDetails
DB13956Estradiol valerateapproved, investigational, vet_approvednoDetails