Known Activities	Starch-binding function demonstrated in one case.
3D Structure Status	β-sandwich
Note	Formerly known as X5 modules; structurally related to CBM26 modules
External resources	InterPro; PFAM;
Statistics	GenBank accession (56); Uniprot accession (30); PDB accession (3); 3D entries (2); cryst (2)

Bacteria
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D
Acear_0308		Acetohalobium arabaticum DSM 5501	ADL11857.1
Adeg_1051		Ammonifex degensii KC4	ACX52183.1
Adeg_0832		Ammonifex degensii KC4	ACX51973.1
α-1,6-cyclomaltopentaose-forming glucanotransferase (IgtY)	2.4.1.-	Bacillus circulans AM7	BAF37283.1	A0P8W9
α-1,6-cyclomaltopentaose-forming glucanotransferase (IgtY)	2.4.1.-	Bacillus circulans AM7	BAF37283.1	A0P8W9
α-amylase (IgtZ)	3.2.1.1	Bacillus circulans AM7	BAF37284.1	A0P8X0
α-amylase (IgtZ)	3.2.1.1	Bacillus circulans AM7	BAF37284.1	A0P8X0
β-amylase	3.2.1.2	Bacillus circulans NCIB 11033	CAA68578.1	P06547.1
ABC1611 (probable maltohexaose-forming amylase)		Bacillus clausii KSM-K16	BAD64146.1	Q5WHK9
β-amylase (fragment)		Bacillus firmus	BAA19075.1	P96513
α-amylase I (AmyI) (alkaline;thermostable)	3.2.1.1	Bacillus halodurans 38C-2-1	BAF93484.1	A8QWV3
α-amylase G-6 (BH0413)	3.2.1.98	Bacillus halodurans C-125	BAB04132.1 NP_241279.1	Q9KFR4	2C3V[A,B] 2C3W[A,B,C,D] 2C3X[A,B]
maltohexaose-forming α-amylase (Amy 34)	3.2.1.98	Bacillus halodurans LBK 34	AAS99099.1	Q5GIA5
maltotetraose-producing α-amylase (AmyA) (alkaline, thermotolerant)	3.2.1.60	Bacillus halodurans MS-2-5	BAG70894.1	B5MEM6
ORF (fragment)		Bacillus horikoshii	CAK97857.1
ORF (fragment)		Bacillus horikoshii	CAK97857.1
α-amylase (BAA)	3.2.1.1	Bacillus sp. 195	BAA22082.1	O24781
α-amylase (BAA)	3.2.1.1	Bacillus sp. 195	BAA22082.1	O24781
maltohexaose-forming amylase (G6-amylase)	3.2.1.98	Bacillus sp. H-167	CAA39096.1	Q45574
Daud_1163		Candidatus Desulforudis audaxviator MP104C	ACA59674.1	B1I453
α-amylase (AmyA;AmyP;CAP0168)	3.2.1.1	Clostridium acetobutylicum ATCC 824	AAA63759.1 AAA63759.2 AAD47072.1 AAK76913.1 NP_149331.1	P23671.2
α-amylase (AmyA;AmyP;CAP0168)	3.2.1.1	Clostridium acetobutylicum ATCC 824	AAA63759.1 AAA63759.2 AAD47072.1 AAK76913.1 NP_149331.1	P23671.2
α-amylase (AmyA;AmyP;CAP0168)	3.2.1.1	Clostridium acetobutylicum ATCC 824	AAA63759.1 AAA63759.2 AAD47072.1 AAK76913.1 NP_149331.1	P23671.2
Cbei_0664		Clostridium beijerinckii NCIMB 8052	ABR32851.1	A6LR71
Cbei_0664		Clostridium beijerinckii NCIMB 8052	ABR32851.1	A6LR71
Ccel_2169		Clostridium cellulolyticum H10 ATCC 35319	ACL76511.1
Cthe_3163		Clostridium thermocellum ATCC 27405	ABN54358.1	A3DK79
Cthe_1080		Clostridium thermocellum ATCC 27405	ABN52312.1	A3DED3
ORF8		Cystobacter fuscus	AAW03335.1	Q5MD26
ORF8		Cystobacter fuscus	AAW03335.1	Q5MD26
Dtox_3604		Desulfotomaculum acetoxidans DSM 771	ACV64316.1
Dtox_1305		Desulfotomaculum acetoxidans DSM 771	ACV62187.1
Dtox_0786		Desulfotomaculum acetoxidans DSM 771	ACV61695.1
Dtox_3542		Desulfotomaculum acetoxidans DSM 771	ACV64258.1
Dred_2336		Desulfotomaculum reducens MI-1	ABO50846.1	A4J6Z3
HMPREF0424_0610 (Pula_1)		Gardnerella vaginalis 409-05	ADB14280.1
Hore_16020		Halothermothrix orenii H 168 H 168; DSM 9562	ACL70351.1
HM1_2795		Heliobacterium modesticaldum Ice1 ATCC 51547	ABZ85324.1	B0TCD6
Jden_1926		Jonesia denitrificans DSM 20603	ACV09568.1
Jden_1926		Jonesia denitrificans DSM 20603	ACV09568.1
Jden_1927		Jonesia denitrificans DSM 20603	ACV09569.1
Jden_1927		Jonesia denitrificans DSM 20603	ACV09569.1
Jden_1927		Jonesia denitrificans DSM 20603	ACV09569.1
Micau_4631		Micromonospora aurantiaca ATCC 27029	ADL48143.1
Micau_4631		Micromonospora aurantiaca ATCC 27029	ADL48143.1
Moth_1937		Moorella thermoacetica ATCC 39073	ABC20235.1	Q2RH54
multidomain α-amylase / β-amylase	3.2.1.1 3.2.1.2	Paenibacillus polymyxa	AAA85446.1 CAA68344.1	P21543.1	cryst
multidomain α-amylase / β-amylase	3.2.1.1 3.2.1.2	Paenibacillus polymyxa	AAA85446.1 CAA68344.1	P21543.1	cryst
β-amylase	3.2.1.2	Paenibacillus sp. KCTC8848P	AAK69489.1	Q934J0
β-amylase	3.2.1.2	Paenibacillus sp. KCTC8848P	AAK69489.1	Q934J0
PTH_1938		Pelotomaculum thermopropionicum SI	BAF60119.1	A5D0W5
PTH_2516		Pelotomaculum thermopropionicum SI	BAF60697.1	A5CZ91
PTH_2901		Pelotomaculum thermopropionicum SI	BAF61082.1	A5CY61
STIAU_0660		Stigmatella aurantiaca DW4/3-1	ZP_01465524.1	Q08T95
STIAU_0660		Stigmatella aurantiaca DW4/3-1	ZP_01465524.1	Q08T95
SCO7019 (Aml)		Streptomyces coelicolor A3(2)	CAB88152.1 NP_631083.1	Q9L036
SCO7019 (Aml)		Streptomyces coelicolor A3(2)	CAB88152.1 NP_631083.1	Q9L036
SGR_6609		Streptomyces griseus subsp. griseus NBRC 13350	BAG23438.1	B1VLP7
SGR_6609		Streptomyces griseus subsp. griseus NBRC 13350	BAG23438.1	B1VLP7
AmlC		Streptomyces lividans TK24	CAB06816.1	P96992
AmlC		Streptomyces lividans TK24	CAB06816.1	P96992
Sros_3336		Streptosporangium roseum DSM 43021	ACZ86275.1
Sros_3336		Streptosporangium roseum DSM 43021	ACZ86275.1
Sros_3337		Streptosporangium roseum DSM 43021	ACZ86276.1
Slip_0512 (possible fragment)		Syntrophothermus lipocalidus DSM 12680	ADI01296.1
Slip_0513		Syntrophothermus lipocalidus DSM 12680	ADI01297.1
TherJR_0882		Thermincola sp. JR	ADG81749.1
maltopentaose-forming amylase	3.2.1.-	unidentified bacterium POSITIVE BACTERIA DSM 5853	CAA37453.1	Q03658
maltopentaose-forming amylase	3.2.1.-	unidentified bacterium POSITIVE BACTERIA DSM 5853	CAA37453.1	Q03658
maltopentaose-forming amylase	3.2.1.-	unidentified bacterium POSITIVE BACTERIA DSM 5853	CAA37453.1	Q03658