Accession ID Name Pfam Type
PF11471 Maltoporin periplasmic N-terminal extension domain

This domain would appear to be the periplasmic, N-terminal extension of the outer membrane maltoporins, Pfam:PF02264, LamB.
Pfam Range: 29-59 DPAM-Pfam Range: 28-36
Uniprot ID: Q6D616
Pfam Range: 26-56 DPAM-Pfam Range: 25-65
Uniprot ID: A6T9Q2
Pfam Range: 28-58 DPAM-Pfam Range: 22-74
Uniprot ID: A0KMI4

References

1: The gene bglH present in the bgl operon of Escherichia coli, responsible for uptake and fermentation of beta-glucosides encodes for a carbohydrate-specific outer membrane porin. Andersen C, Rak B, Benz R; Mol Microbiol. 1999;31:499-510. PMID:10027967