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FABP3
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 1G5W, 1HMR, 1HMS, 1HMT, 2HMB, 3RSW, 3WBG, 3WVM, 3WXQ, 4TJZ, 4TKB, 4TKH, 4TKJ, 4WBK, 5CE4
Identifiers
Aliases	FABP3, FABP11, H-FABP, M-FABP, MDGI, O-FABP, Heart-type fatty acid binding protein, fatty acid binding protein 3
External IDs	OMIM: 134651; MGI: 95476; HomoloGene: 68379; GeneCards: FABP3; OMA:FABP3 - orthologs
Gene location (Human) Chr. Chromosome 1 (human) Band 1p35.2 Start 31,365,253 bp End 31,376,850 bp
Gene location (Mouse) Chr. Chromosome 4 (mouse) Band 4 D2.2|4 63.43 cM Start 130,202,388 bp End 130,209,256 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in apex of heart right auricle left ventricle muscle of thigh right ventricle gastrocnemius muscle myocardium of left ventricle vena cava cardiac muscle tissue of right atrium right coronary artery Top expressed in heart muscle of thigh muscle tissue skeletal muscle tissue blastocyst quadriceps femoris muscle placenta right kidney morula human kidney More reference expression data BioGPS More reference expression data
Gene ontology Molecular function long-chain fatty acid transporter activity transporter activity long-chain fatty acid binding oleic acid binding cytoskeletal protein binding fatty acid binding protein binding icosatetraenoic acid binding lipid binding Cellular component cytoplasm cytosol sarcoplasm extracellular exosome extracellular space Biological process response to fatty acid positive regulation of phospholipid biosynthetic process fatty acid metabolic process triglyceride catabolic process response to insulin negative regulation of cell population proliferation long-chain fatty acid transport cholesterol homeostasis long-chain fatty acid import into cell regulation of fatty acid oxidation phospholipid homeostasis regulation of phosphatidylcholine biosynthetic process transport intracellular lipid transport positive regulation of long-chain fatty acid import into cell Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 2170 14077 Ensembl ENSG00000121769 ENSMUSG00000028773 UniProt P05413 P11404 RefSeq (mRNA) NM_004102 NM_001320996 NM_010174 RefSeq (protein) NP_001307925 NP_004093 NP_034304 Location (UCSC) Chr 1: 31.37 – 31.38 Mb Chr 4: 130.2 – 130.21 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Heart-type fatty acid binding protein (hFABP) also known as mammary-derived growth inhibitor is a protein that in humans is encoded by the FABP3 gene.

Function

Heart-type Fatty Acid-Binding Protein (H-FABP) is a small cytoplasmic protein (15 kDa) released from cardiac myocytes following an ischemic episode. Like the nine other distinct FABPs that have been identified, H-FABP is involved in active fatty acid metabolism where it transports fatty acids from the cell membrane to mitochondria for oxidation. See FABP3 for biochemical details.

The intracellular fatty acid-binding proteins (FABPs) belongs to a multigene family. FABPs are divided into at least three distinct types, namely the hepatic-, intestinal- and cardiac-type. They form 14-15 kDa proteins and are thought to participate in the uptake, intracellular metabolism and/or transport of long-chain fatty acids. They may also be responsible in the modulation of cell growth and proliferation. Fatty acid-binding protein 3 gene contains four exons and its function is to arrest growth of mammary epithelial cells. This gene is also a candidate tumor suppressor gene for human breast cancer.

Interactions

FABP3 is known to interact with TNNI3K in the context of interacting with cardiac troponin I. The protein also interacts with, VPS28, KIAA159, NUP62, PLK1, UBC, and Xpo1.

In HIV, a synthetic peptide corresponding to the immunosuppressive domain (amino acids 574-592) of HIV-1 gp41 downregulates the expression of fatty acid binding protein 3 (FABP3) in peptide-treated PBMCs.

Clinical significance

Diagnostic potential

H-FABP is a sensitive biomarker for myocardial infarction and can be detected in the blood within one to three hours of the pain.

The diagnostic potential of the biomarker H-FABP for heart injury was discovered in 1988 by Professor Jan Glatz (Maastricht, Netherlands). H-FABP is 20 times more specific to cardiac muscle than myoglobin, it is found at 10-fold lower levels in skeletal muscle than heart muscle and the amounts in the kidney, liver and small intestine are even lower again.

H-FABP is recommended to be measured with troponin to identify myocardial infarction and acute coronary syndrome in patients presenting with chest pain. H-FABP measured with troponin shows increased sensitivity of 20.6% over troponin at 3–6 hours following chest pain onset. This sensitivity may be explained by the high concentration of H-FABP in myocardium compared to other tissues, the stability and solubility of H-FABP, its low molecular weight; 15kDa compared to 18, 80 and 37kDa for MYO, CK-MB and cTnT respectively, its rapid release into plasma after myocardial injury – 60 minutes after an ischemic episode, and its relative tissue specificity. Similarly this study showed that measuring H-FABP in combination with troponin increased the diagnostic accuracy and with a negative predictive value of 98% could be used to identify those not suffering from MI at the early time point of 3–6 hours post chest pain onset. The effectiveness of using the combination of H-FABP with troponin to diagnose MI within 6 hours is well reported.

Prognostic potential

In addition to its diagnostic potential, H-FABP also has prognostic value. Alongside D-dimer, NT-proBNP and peak troponin T, it was the only cardiac biomarker that proved to be a statistically significant predictor of death or MI at one year. This prognostic information was independent of troponin T, ECG and clinical examination. The risk associated with raised H-FABP is dependent upon its concentration. Patients who were TnI negative but H-FABP positive had 17% increased risk of all cause mortality within one year compared to those patients who were TnI positive but H-FABP negative. Currently these TnI positive patients are prioritised for angioplasty, and the TnI negative patients are considered to be of a lower priority, yet the addition of the H-FABP test helps identify patients who are currently slipping through the net and allows physicians to more appropriately manage this hidden high risk group. If both biomarkers were negative, there is 0% mortality at 6 months, in the authors own words this “represents a particularly worthwhile clinical outcome, especially because it was observed in patients admitted into hospital for suspected ACS.” H-FABP indicates risk across the ACS spectrum including UA, NSTEMI or STEMI where low H-FABP concentrations confer low risk whereas high H-FABP concentrations indicate patients who are at a much higher risk of future events.

H-FABP in other diseases

H-FABP has been proven to significantly predict 30-day mortality in acute pulmonary embolism. H-FABP is more effective than Troponin T in risk stratifying Chronic Heart Failure patients. H-FABP is beginning to create interest with researchers who have found emerging evidence that indicates a role in differentiating between different neurodegenerative diseases.

H-FABP Point of care testing

To obtain diagnostic and prognostic information a precise and fully quantitative measurement of H-FABP is required. Commercial tests include a Cardiac Array on Evidence MultiStat; and an automated biochemistry assay

See also

• Akash Manoj – Indian inventor who developed wearable device to detect h-FABP

References

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2. ^ GRCm38: Ensembl release 89: ENSMUSG00000028773 – Ensembl, May 2017
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6. ^ "Entrez Gene: FABP3 fatty acid binding protein 3, muscle and heart (mammary-derived growth inhibitor)".
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8. Zhao Y, Meng XM, Wei YJ, Zhao XW, Liu DQ, Cao HQ, Liew CC, Ding JF (May 2003). "Cloning and characterization of a novel cardiac-specific kinase that interacts specifically with cardiac troponin I". Journal of Molecular Medicine. 81 (5): 297–304. doi:10.1007/s00109-003-0427-x. PMID 12721663. S2CID 13468188.
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11. Denner J, Eschricht M, Lauck M, Semaan M, Schlaermann P, Ryu H, Akyüz L (2013). "Modulation of cytokine release and gene expression by the immunosuppressive domain of gp41 of HIV-1". PLOS ONE. 8 (1): e55199. Bibcode:2013PLoSO...855199D. doi:10.1371/journal.pone.0055199. PMC 3559347. PMID 23383108.
12. Tanaka T, Hirota Y, Sohmiya K, Nishimura S, Kawamura K (Apr 1991). "Serum and urinary human heart fatty acid-binding protein in acute myocardial infarction". Clinical Biochemistry. 24 (2): 195–201. doi:10.1016/0009-9120(91)90571-U. PMID 2040092.
13. Watanabe K, Wakabayashi H, Veerkamp JH, Ono T, Suzuki T (May 1993). "Immunohistochemical distribution of heart-type fatty acid-binding protein immunoreactivity in normal human tissues and in acute myocardial infarct". The Journal of Pathology. 170 (1): 59–65. doi:10.1002/path.1711700110. PMID 8326460. S2CID 20506087.
14. ^ Glatz JF, van Bilsen M, Paulussen RJ, Veerkamp JH, van der Vusse GJ, Reneman RS (Jul 1988). "Release of fatty acid-binding protein from isolated rat heart subjected to ischemia and reperfusion or to the calcium paradox". Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism. 961 (1): 148–52. doi:10.1016/0005-2760(88)90141-5. PMID 3260112.
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Further reading

• Spener F, Unterberg C, Börchers T, Grosse R (1991). "Characteristics of fatty acid-binding proteins and their relation to mammary-derived growth inhibitor". Molecular and Cellular Biochemistry. 98 (1–2): 57–68. doi:10.1007/bf00231368. PMID 2266970. S2CID 25352613.
• Zanotti G, Scapin G, Spadon P, Veerkamp JH, Sacchettini JC (Sep 1992). "Three-dimensional structure of recombinant human muscle fatty acid-binding protein". The Journal of Biological Chemistry. 267 (26): 18541–50. doi:10.2210/pdb2hmb/pdb. PMID 1526991.
• Peeters RA, Veerkamp JH, Geurts van Kessel A, Kanda T, Ono T (May 1991). "Cloning of the cDNA encoding human skeletal-muscle fatty-acid-binding protein, its peptide sequence and chromosomal localization". The Biochemical Journal. 276 (Pt 1): 203–7. doi:10.1042/bj2760203. PMC 1151165. PMID 1710107.
• Tanaka T, Hirota Y, Sohmiya K, Nishimura S, Kawamura K (Apr 1991). "Serum and urinary human heart fatty acid-binding protein in acute myocardial infarction". Clinical Biochemistry. 24 (2): 195–201. doi:10.1016/0009-9120(91)90571-U. PMID 2040092.
• Börchers T, Højrup P, Nielsen SU, Roepstorff P, Spener F, Knudsen J (1990). "Revision of the amino acid sequence of human heart fatty acid-binding protein". Cellular Fatty Acid-binding Proteins. Vol. 98. pp. 127–33. doi:10.1007/978-1-4615-3936-0_16. ISBN 978-1-4613-6756-7. PMID 2266954. {{cite book}}: |journal= ignored (help)
• Offner GD, Brecher P, Sawlivich WB, Costello CE, Troxler RF (May 1988). "Characterization and amino acid sequence of a fatty acid-binding protein from human heart". The Biochemical Journal. 252 (1): 191–8. doi:10.1042/bj2520191. PMC 1149123. PMID 3421901.
• Kovalyov LI, Shishkin SS, Efimochkin AS, Kovalyova MA, Ershova ES, Egorov TA, Musalyamov AK (Jul 1995). "The major protein expression profile and two-dimensional protein database of human heart". Electrophoresis. 16 (7): 1160–9. doi:10.1002/elps.11501601192. PMID 7498159. S2CID 32209361.
• Nielsen SU, Spener F (Aug 1993). "Fatty acid-binding protein from rat heart is phosphorylated on Tyr19 in response to insulin stimulation". Journal of Lipid Research. 34 (8): 1355–66. doi:10.1016/S0022-2275(20)36965-0. PMID 7691977.
• Huynh HT, Larsson C, Narod S, Pollak M (Jun 1995). "Tumor suppressor activity of the gene encoding mammary-derived growth inhibitor". Cancer Research. 55 (11): 2225–31. PMID 7757968.
• Young AC, Scapin G, Kromminga A, Patel SB, Veerkamp JH, Sacchettini JC (Jun 1994). "Structural studies on human muscle fatty acid binding protein at 1.4 A resolution: binding interactions with three C18 fatty acids". Structure. 2 (6): 523–34. doi:10.1016/S0969-2126(00)00052-6. PMID 7922029.
• Yang Y, Spitzer E, Kenney N, Zschiesche W, Li M, Kromminga A, Müller T, Spener F, Lezius A, Veerkamp JH (Nov 1994). "Members of the fatty acid binding protein family are differentiation factors for the mammary gland". The Journal of Cell Biology. 127 (4): 1097–109. doi:10.1083/jcb.127.4.1097. PMC 2200063. PMID 7962070.
• Troxler RF, Offner GD, Jiang JW, Wu BL, Skare JC, Milunsky A, Wyandt HE (Dec 1993). "Localization of the gene for human heart fatty acid binding protein to chromosome 1p32-1p33". Human Genetics. 92 (6): 563–6. doi:10.1007/BF00420939. PMID 8262516. S2CID 11474592.
• Watanabe K, Wakabayashi H, Veerkamp JH, Ono T, Suzuki T (May 1993). "Immunohistochemical distribution of heart-type fatty acid-binding protein immunoreactivity in normal human tissues and in acute myocardial infarct". The Journal of Pathology. 170 (1): 59–65. doi:10.1002/path.1711700110. PMID 8326460. S2CID 20506087.
• Zhao Y, Meng XM, Wei YJ, Zhao XW, Liu DQ, Cao HQ, Liew CC, Ding JF (May 2003). "Cloning and characterization of a novel cardiac-specific kinase that interacts specifically with cardiac troponin I". Journal of Molecular Medicine. 81 (5): 297–304. doi:10.1007/s00109-003-0427-x. PMID 12721663. S2CID 13468188.
• Cheon MS, Kim SH, Fountoulakis M, Lubec G (2003). "Heart type fatty acid binding protein (H-FABP) is decreased in brains of patients with Down syndrome and Alzheimer's disease". Advances in Down Syndrome Research. Journal of Neural Transmission Supplement 67. Vol. 67. pp. 225–34. doi:10.1007/978-3-7091-6721-2_20. ISBN 978-3-211-40776-9. PMID 15068254. {{cite book}}: |journal= ignored (help)
• Hashimoto T, Kusakabe T, Sugino T, Fukuda T, Watanabe K, Sato Y, Nashimoto A, Honma K, Kimura H, Fujii H, Suzuki T (2005). "Expression of heart-type fatty acid-binding protein in human gastric carcinoma and its association with tumor aggressiveness, metastasis and poor prognosis". Pathobiology. 71 (5): 267–73. doi:10.1159/000080061. PMID 15459486. S2CID 983644.

• Genes on human chromosome 1
• Cardiology