Powering down the Pfam website
On October 5th, we began redirecting traffic from Pfam (pfam.xfam.org) to InterPro (www.ebi.ac.uk/interpro). The Pfam website will remain available at pfam-legacy.xfam.org until January 2023, when it will be decommissioned. You can read more about the sunset period in our blog post.

Please note: this site relies heavily on the use of javascript. Without a javascript-enabled browser, this site will not function correctly. Please enable javascript and reload the page, or switch to a different browser.
38  structures 1830  species 0  interactions 6780  sequences 356  architectures

Clan: STARBD (CL0576)


Starch-binding domain like superfamily Add an annotation

This is a superfamily of starch-binding domains thta are distinct from the CBM, carbohydrate-binding superfamily. STARBD ares characterised by a beta-sandwich arranged as a greek key, of seven betA-strands in two sheets, with some members having additionlly one or two strands.

This clan contains 4 families and the total number of domains in the clan is 6780. The clan was built by P Coggill.


This clan contains the following 4 member families:

CBM26 CBM53 CBM_21 CBM_25

External database links

Domain organisation

Below is a listing of the unique domain organisations or architectures from this clan. More...

Loading domain graphics...


The table below shows the number of occurrences of each domain throughout the sequence database. More...

Pfam family Num. domains Alignment
CBM_21 (PF03370) 3905 (57.6%) View
CBM53 (PF16760) 1574 (23.2%) View
CBM26 (PF16738) 769 (11.3%) View
CBM_25 (PF03423) 532 (7.8%) View
Total: 4 Total: 6780 Clan alignment

Please note: Clan alignments can be very large and can cause problems for some browsers. Read the note above before viewing.

Family relationships

This diagram shows the relationships between members of this clan. More...

Species distribution

Tree controls


This tree shows the occurrence of the domains in this clan across different species. More...



For those sequences which have a structure in the Protein DataBank, we use the mapping between UniProt, PDB and Pfam coordinate systems from the MSD group, to allow us to map Pfam domains onto UniProt three-dimensional structures. The table below shows the mapping between the Pfam families in this clan, the corresponding UniProt entries, and the region of the three-dimensional structures that are available for that sequence.

Loading structure mapping...