Argos P
European Molecular Biology Laboratory, Heidelberg, FRG.
Nucleic Acids Res. 1988 Nov 11;16(21):9909-16. doi: 10.1093/nar/16.21.9909.
A 15-residue sequence motif has been found in many polymerases from various species and involving DNA and RNA dependence and product. The motif is characterized by a Tyr-Gly-Asp-(Thr)-Asp core flanked by hydrophobic spans five residues in length. An mRNA maturase segment is also suggested to display the motif pattern. The aspartates may be important in polymerase function by acting directly in catalysis and/or by binding magnesium.
在来自不同物种的许多聚合酶中发现了一个15个残基的序列基序,涉及DNA和RNA依赖性以及产物。该基序的特征是一个酪氨酸-甘氨酸-天冬氨酸-(苏氨酸)-天冬氨酸核心,两侧是长度为五个残基的疏水跨度。还表明一个mRNA成熟酶片段也呈现该基序模式。天冬氨酸可能通过直接参与催化和/或结合镁在聚合酶功能中起重要作用。