Platelet-activating factor acetylhydrolase IB subunit alpha or Lisencephaly protein-1 (LIS-1) is an enzyme that in humans is encoded by the PAFAH1B1gene.[5][6][7] The protein plays an important role in regulating the motor protein dynein.[8]
Function
PAFAH1B1 was identified as encoding a gene that when mutated or lost caused the lissencephaly associated with Miller–Dieker syndrome. PAFAH1B1 encodes the non-catalytic alpha subunit of the intracellular Ib isoform of platelet-activating factor acetylhydrolase, a heterotrimeric enzyme that specifically catalyzes the removal of the acetyl group at the SN-2 position of platelet-activating factor (identified as 1-O-alkyl-2-acetyl-sn-glyceryl-3-phosphorylcholine). Two other isoforms of intracellular platelet-activating factor acetylhydrolase exist: one composed of multiple subunits, the other, a single subunit. In addition, a single-subunit isoform of this enzyme is found in serum.[7]
The gene is located at chromosome 17p13.3 on the Watson (plus) strand. The gene is 91,953 bases in length and encodes a protein of 410 amino acids (predicted molecular weight 46.638 kilodaltons).
^ abSweeney KJ, Clark GD, Prokscha A, Dobyns WB, Eichele G (Apr 2000). "Lissencephaly associated mutations suggest a requirement for the PAFAH1B heterotrimeric complex in brain development". Mechanisms of Development. 92 (2): 263–71. doi:10.1016/S0925-4773(00)00242-2. PMID10727864. S2CID2447495.
Hattori M, Adachi H, Tsujimoto M, Arai H, Inoue K (Jul 1994). "Miller-Dieker lissencephaly gene encodes a subunit of brain platelet-activating factor acetylhydrolase [corrected]". Nature. 370 (6486): 216–8. doi:10.1038/370216a0. PMID8028668. S2CID4261133.
Reiner O, Bar-Am I, Sapir T, Shmueli O, Carrozzo R, Lindsay EA, Baldini A, Ledbetter DH, Cahana A (Nov 1995). "LIS2, gene and pseudogene, homologous to LIS1 (lissencephaly 1), located on the short and long arms of chromosome 2". Genomics. 30 (2): 251–6. doi:10.1006/geno.1995.9880. PMID8586424.
Isumi H, Takashima S, Kakita A, Yamada M, Ikeda K, Mizuguchi M (Jan 1997). "Expression of the LIS-1 gene product in brain anomalies with a migration disorder". Pediatric Neurology. 16 (1): 42–4. doi:10.1016/S0887-8994(96)00260-3. PMID9044400.
Sweeney KJ, Clark GD, Prokscha A, Dobyns WB, Eichele G (Apr 2000). "Lissencephaly associated mutations suggest a requirement for the PAFAH1B heterotrimeric complex in brain development". Mechanisms of Development. 92 (2): 263–71. doi:10.1016/S0925-4773(00)00242-2. PMID10727864. S2CID2447495.