The SmartBLAST service has recently been updated to emphasize matches to the landmark database, which comprises the proteomes from 26 well-curated genomic assemblies. The display also now presents more information about conserved domains and details about the query.
SmartBLAST quickly finds the closest relatives to a protein query and evaluates the phylogenetic relationship among the query and matched sequences. You can start a SmartBLAST search from the SmartBLAST page or the BLAST home page. Read more about SmartBLAST on NCBI Insights.