2DW7

Crystal structure of D-tartrate dehydratase from Bradyrhizobium japonicum complexed with Mg++ and meso-tartrate


Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad2dw7a1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Ad2dw7a2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Bd2dw7b1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Bd2dw7b2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Cd2dw7c1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Cd2dw7c2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Dd2dw7d1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Dd2dw7d2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Ed2dw7e1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Ed2dw7e2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Fd2dw7f1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Fd2dw7f2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Gd2dw7g1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Gd2dw7g2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Hd2dw7h1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Hd2dw7h2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Id2dw7i1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Id2dw7i2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Jd2dw7j1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Jd2dw7j2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Kd2dw7k1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Kd2dw7k2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Ld2dw7l1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Ld2dw7l2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Md2dw7m1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Md2dw7m2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Nd2dw7n1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Nd2dw7n2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Od2dw7o1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Od2dw7o2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Pd2dw7p1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like D-glucarate dehydratase-like automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)
Pd2dw7p2 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bradyrhizobium japonicum ) [TaxId: 375 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
CSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
CSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
DSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
DSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
ESCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
ESCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
FSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
FSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
GSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
GSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
HSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
HSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
ISCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
ISCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
JSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
JSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
KSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
KSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
LSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
LSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
MSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
MSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
NSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
NSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
OSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)
OSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
PSCOP2B SuperfamilyEnolase N-terminal domain-like8039950 3001064 SCOP2B (2022-06-29)
PSCOP2B SuperfamilyEnolase C-terminal domain-like8039949 3000476 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
APF02746e2dw7A1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
APF13378e2dw7A2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
BPF02746e2dw7B1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
BPF13378e2dw7B2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
CPF02746e2dw7C1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
CPF13378e2dw7C2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
DPF02746e2dw7D1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
DPF13378e2dw7D2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
EPF02746e2dw7E1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
EPF13378e2dw7E2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
FPF02746e2dw7F1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
FPF13378e2dw7F2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
GPF02746e2dw7G1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
GPF13378e2dw7G2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
HPF02746e2dw7H1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
HPF13378e2dw7H2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
IPF02746e2dw7I1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
IPF13378e2dw7I2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
JPF02746e2dw7J1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
JPF13378e2dw7J2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
KPF02746e2dw7K1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
KPF13378e2dw7K2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
LPF02746e2dw7L1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
LPF13378e2dw7L2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
MPF02746e2dw7M1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
MPF13378e2dw7M2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
NPF02746e2dw7N1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
NPF13378e2dw7N2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
OPF02746e2dw7O1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
OPF13378e2dw7O2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)
PPF02746e2dw7P1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: PF02746ECOD (1.6)
PPF13378e2dw7P2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PF13378ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
A3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
B3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
B3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
C3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
C3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
D3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
D3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
E3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
E3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
F3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
F3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
G3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
G3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
H3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
H3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
I3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
I3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
J3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
J3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
K3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
K3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
L3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
L3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
M3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
M3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
N3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
N3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
O3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
O3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
P3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
P3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B, C, D, E
PF13378Enolase C-terminal domain-like (MR_MLE_C)Enolase C-terminal domain-likeThis domain appears at the C-terminus of many of the proteins that carry the MR_MLE_N Pfam:PF02746 domain. EC:4.2.1.40.Domain

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A, B, C, D, E
IPR034593D-galactonate dehydratase DgoD-likeFamily
A, B, C, D, E
IPR029065Enolase C-terminal domain-likeDomain
A, B, C, D, E
IPR013342Mandelate racemase/muconate lactonizing enzyme, C-terminalDomain
A, B, C, D, E
IPR029017Enolase-like, N-terminalHomologous Superfamily
A, B, C, D, E
IPR034611D-tartrate dehydrataseFamily
A, B, C, D, E
IPR036849Enolase-like, C-terminal domain superfamilyHomologous Superfamily

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
D(-)-tartrate dehydratase  M-CSA #463

D-tartrate dehydratase (TarD), isolated from Bradyrhizobium japonicum, catalyses the dehydration of D-tartrate to oxaloacetate and water. TarD is a member of the mandelate racemase subgroup of the enolase superfamily.

Defined by 9 residues: ASN:A-55LYS:A-182LYS:A-184ASP:A-213GLU:A-239GLU:A-265ASP:A-292HIS:A-322GLU:A-341
 | 
 
Explore in 3DM-CSA Motif Definition