The crystal structures of Dex49A from Penicillium minioluteum [1] and of ATCC9642 isopullulanase from Aspergillus niger [2] include beta-solenoid repeats, sharing structural similarities. This Pfam entry includes a single repeat unit of the repeat regions.

1: Dextranase from Penicillium minioluteum: reaction course, crystal structure, and product complex. Larsson AM, Andersson R, Stahlberg J, Kenne L, Jones TA; Structure. 2003;11:1111-1121. PMID:12962629

2: Crystal structure of Aspergillus niger isopullulanase, a member of glycoside hydrolase family 49. Mizuno M, Koide A, Yamamura A, Akeboshi H, Yoshida H, Kamitori S, Sakano Y, Nishikawa A, Tonozuka T; J Mol Biol. 2008;376:210-220. PMID:18155243