Garau Gianpiero, Di Guilmi Anne Marie, Hall Barry G
Laboratoire de Cristallographie Macromoléulaire, Institut de Biologie Structural Jean-Pierre Ebel, CEA-CNRS-UJF, Grenoble, France.
Antimicrob Agents Chemother. 2005 Jul;49(7):2778-84. doi: 10.1128/AAC.49.7.2778-2784.2005.
The metallo-beta-lactamases fall into two groups: Ambler class B subgroups B1 and B2 and Ambler class B subgroup B3. The two groups are so distantly related that there is no detectable sequence homology between members of the two different groups, but homology is clearly detectable at the protein structure level. The multiple structure alignment program MAPS has been used to align the structures of eight metallo-beta-lactamases and five structurally homologous proteins from the metallo-beta-lactamase superfamily, and that alignment has been used to construct a phylogenetic tree of the metallo-beta-lactamases. The presence of genes from Eubacteria, Archaebacteria, and Eukaryota on that tree is consistent with a very ancient origin of the metallo-beta-lactamase family.
金属β-内酰胺酶分为两组:安布勒B类亚组B1和B2以及安布勒B类亚组B3。这两组的亲缘关系非常远,以至于两个不同组的成员之间没有可检测到的序列同源性,但在蛋白质结构水平上同源性是明显可检测到的。多重结构比对程序MAPS已被用于比对八种金属β-内酰胺酶和来自金属β-内酰胺酶超家族的五种结构同源蛋白的结构,并且该比对已被用于构建金属β-内酰胺酶的系统发育树。该树上存在来自真细菌、古细菌和真核生物的基因,这与金属β-内酰胺酶家族非常古老的起源是一致的。