Carbohydrate-Binding Module Family 13

Activities in FamilyModules of approx. 150 residues which always appear as a threefold internal repeat. The only apparent exception to this, xylanase II of Actinomadura sp. FC7 (GenBank U08894), is in fact not completely sequenced. These modules were first identified in several plant lectins such as ricin or agglutinin of Ricinus communis which bind galactose residues. The three-dimensional structure of a plant lectin has been determined and displays a pseudo-threefold symmetry in accord with the observed sequence threefold repeat. These modules have since been found in a number of other proteins of various functions including glycoside hydrolases and glycosyltransferases. While in the plant lectins this module binds mannose, binding to xylan has been demonstrated in the Streptomyces lividans xylanase A and arabinofuranosidase B. Binding to GalNAc has been shown for the corresponding module of GalNAc transferase 4. For the other proteins, the binding specificity of these modules has not been established. The pseudo three-fold symmetry of the CBM13 module has now been confirmed in the 3-D structure of the intact, two-domain, xylanase of Streptomyces olivaceoviridis.
3D Structure Statusβ-trefoil
NotePreviously known as cellulose-binding domain family XIII (CBD XIII).
External resourcesHOMSTRAD;
Statistics GenBank accession (5533); Uniprot accession (902); PDB accession (143); 3D entries (56); cryst (1)
All (5278) Archaea (18) Bacteria (4665) Eukaryota (558) Viruses (26) unclassified (11) Structure (56 - 1 cryst) Characterized (99)
| 1 | 2 | 3 | 4 | 5 | 6 |
Eukaryota
Protein Name EC#OrganismGenBank UniprotPDB/3D
 secreted protein   Thraustotheca clavata ATCC 34112 AIG55751.1    
 UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase T3 (ppGalNAc-T3) 2.4.1.41 Toxoplasma gondii AAQ95173.1
AAO20278.1
Q6YBY0  
 RBL (TvRBL)   Trichoderma viride AIZ77171.1    
 lectin (SGSL)   Trichosanthes anguina     4HR6[C]
 lectin (SGSL)   Trichosanthes anguina     4HR6[C]
 ORF   Trichosporon asahii TIMM 1318 BAB20765.1 Q9HFB0  
 VIGAN_01092100 (Vigan.01g092100)   Vigna angularis var. angularis BAT73439.1    
 ribosome-inactivating protein   Viscum album AAT37532.1 Q6ITZ3 1PC8[B]
1TFM[B]
1YF8[B]
 ribosome-inactivating protein   Viscum album AAT37532.1 Q6ITZ3 1PC8[B]
1TFM[B]
1YF8[B]
 lectin I (ML-I)   Viscum album AAR25545.1
AAL87006.1
AAR25546.1
ABA32657.1
ABA32659.1
ABA32660.1
ABA32661.1
ABA32662.1
ABA32663.1
ABA32664.1
P81446
P81830
1ONK[B]
1OQL[B]
1SZ6[B]
2R9K[B]
2RG9[B]
3CEF[B]
3D7W[B]
3O5W[B]
4EB2[B]
4JKX[B]
 lectin I (ML-I)   Viscum album AAR25545.1
AAL87006.1
AAR25546.1
ABA32657.1
ABA32659.1
ABA32660.1
ABA32661.1
ABA32662.1
ABA32663.1
ABA32664.1
P81446
P81830
1ONK[B]
1OQL[B]
1SZ6[B]
2R9K[B]
2RG9[B]
3CEF[B]
3D7W[B]
3O5W[B]
4EB2[B]
4JKX[B]
 lectin   Viscum album AAR25549.1 Q6H266  
 lectin   Viscum album AAR25549.1 Q6H266  
 lectin   Viscum album AAR25548.1 P82683  
 lectin   Viscum album AAR25548.1 P82683  
 lectin   Viscum album AAR25551.1 Q6H266  
 lectin   Viscum album AAR25551.1 Q6H266  
 lectin   Viscum album AAR25550.1 Q6H266  
 lectin   Viscum album AAR25550.1 Q6H266  
 lectin   Viscum album AAR25547.1 P82683  
 lectin   Viscum album AAR25547.1 P82683  
 Sequence 1 from patent US 6927207   Viscum album ABA32654.1
ABA32656.1
ABA32668.1
   
 Sequence 1 from patent US 6927207   Viscum album ABA32654.1
ABA32656.1
ABA32668.1
   
 lectin B-chain   Viscum album CAB69394.1
CAB69397.1
   
 lectin B-chain   Viscum album CAB69394.1
CAB69397.1
   
 articulatin   Viscum articulatum ABU95610.1 B3F5I6  
 articulatin   Viscum articulatum ABU95610.1 B3F5I6  
 agglutinin (VCA)   Viscum coloratum AAL40417.1 Q8W243  
 agglutinin (VCA)   Viscum coloratum AAL40417.1 Q8W243  
 Sequence 10 from patent US 6846913   Viscum coloratum AAX04115.1 Q8LKQ2  
 Sequence 10 from patent US 6846913   Viscum coloratum AAX04115.1 Q8LKQ2  
 lectin   Viscum coloratum AAY34343.1 Q4U4N0  
 lectin   Viscum coloratum AAY34343.1 Q4U4N0  
 ribosome-inactivating protein precursor, partial   Viscum ovalifolium AEL79474.1    
 ribosome-inactivating protein precursor, partial   Viscum ovalifolium AEL79474.1    
 Ricin B lectin domain   Xanthophyllomyces dendrorhous CED83142.1    
 Ricin B lectin domain   Xanthophyllomyces dendrorhous CED83142.1    
 MGC68664 (xGalNT-1)   Xenopus laevis AAH60419.1 Q6PA81  
 MGC78803 (xGalNT-7)   Xenopus laevis AAH70527.1 Q6NS24  
 MGC81150 (xGalNT-4)   Xenopus laevis AAH71009.1 Q6IR91  
 MGC83963   Xenopus laevis AAH74234.1 Q6GM51  
 MGC81846 (xGalNT-11)   Xenopus laevis AAH80006.1 Q68F39  
 MGC130697 (xGalNT-6)   Xenopus laevis AAI10707.1 Q2TAV9  
 MGC154539   Xenopus laevis AAI24896.1 Q08B33  
 MGC160938 (xGalntl-1)   Xenopus laevis AAI42582.1 A5PKR1  
 MGC:76103   Xenopus tropicalis AAH67317.1 Q6NX21  
 Unknown (protein for MGC:79650)   Xenopus tropicalis AAH75106.1 Q6DJR8  
 TGas006c10.1-001   Xenopus tropicalis CAJ81616.1 Q28D20  
 TGas071o13.1-001   Xenopus tropicalis CAJ83416.1
AAI21348.1
AAI35810.1
Q28CC6  
 Unknown (protein for MGC:146638)   Xenopus tropicalis AAI21473.1 Q0V9M3  
 Unknown (protein for MGC:145354)   Xenopus tropicalis AAI21876.1 Q0P4W5  
 Unknown (protein for MGC:147591)   Xenopus tropicalis AAI21701.1 Q0IIR5  
 Unknown (protein for MGC:147602)   Xenopus tropicalis AAI24052.1
AAI35912.1
Q08CX0  
 Unknown (protein for IMAGE:7719810)   Xenopus tropicalis AAI25762.1 A0JM69  
 riproximin (rpx)   Ximenia americana CAJ38823.1 Q2PA54  
 riproximin (rpx)   Ximenia americana CAJ38823.1 Q2PA54  
 unknown (ZM_BFc0001H02)   Zea mays B73 ACF84223.1 B4FQ30  
 unknown (ZM_BFc0001H02)   Zea mays B73 ACF84223.1 B4FQ30  
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