Evolutionary classification of protein domain structures
alpha arraysalpha-helix arrays with mainly perpendicular helices
alpha bundlesalpha-helix bundles with mainly parallel helices
alpha superhelicesrepeating alpha-helix hairpins form a superhelix
alpha duplicates or obligate multimersalpha duplicates or monomers associate together to form a compact domain
alpha complex topologyalpha domain with complex and unique topology that cannot be described as array or bundle or superhelix
beta barrelssingle beta-sheet folded upon itself to form a barrel
beta meanderssingle beta-sheet with mainly meander topology




Representatives:
e1inlA2[A:2-71]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Spermidine synthase ; X-RAY DIFFRACTION 1.5Å
e8iyiB1[B:4-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; X-RAY DIFFRACTION 1.9Å
e1jq3B3[B:2-71] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 1.8Å
e1inlD3[D:4-71] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; X-RAY DIFFRACTION 1.5Å
e1jq3A3[A:2-71] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: AAT ; X-RAY DIFFRACTION 1.8Å
e1inlB3[B:2-71] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; X-RAY DIFFRACTION 1.5Å
e1jq3D3[D:4-71] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: AAT ; X-RAY DIFFRACTION 1.8Å
e1jq3C3[C:4-71] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: AAT ; X-RAY DIFFRACTION 1.8Å
e1inlC3[C:4-71] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; X-RAY DIFFRACTION 1.5Å
e1iy9B2[B:1002-1057] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.3Å
e1iy9C2[C:2002-2057] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.3Å
e1iy9D2[D:3002-3057] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.3Å
e1iy9A2[A:2-57] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.3Å
e1mjfB2[B:3-55] Image Pymol Jmol Links: PDB, SCOP, CATH
spermidine synthase ; X-RAY DIFFRACTION 1.8Å
e2o06A3[A:6-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: MTA,PUT ; X-RAY DIFFRACTION 2.0Å
e2o07B3[B:15-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: MTA,SPD ; X-RAY DIFFRACTION 1.89Å
e2o06B3[B:14-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: MTA,PUT ; X-RAY DIFFRACTION 2.0Å
e2o0lB3[B:15-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: S4M ; X-RAY DIFFRACTION 1.99Å
e2o05A3[A:15-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: MTA ; X-RAY DIFFRACTION 2.0Å
e1xj5A3[A:41-101] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase 1 ; X-RAY DIFFRACTION 2.66Å
e2o05B3[B:15-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: MTA ; X-RAY DIFFRACTION 2.0Å
e2o0lA3[A:16-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: S4M ; X-RAY DIFFRACTION 1.99Å
e1xj5C3[C:41-101] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase 1 ; X-RAY DIFFRACTION 2.66Å
e1xj5B3[B:38-101] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase 1 ; X-RAY DIFFRACTION 2.66Å
e2q41C3[C:41-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE 1 ; X-RAY DIFFRACTION 2.7Å
e2b2cB3[B:3-17,B:41-89] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
spermidine synthase ; X-RAY DIFFRACTION 2.5Å
e2b2cA3[A:3-17,A:41-89] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
spermidine synthase ; X-RAY DIFFRACTION 2.5Å
e2q41A3[A:41-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE 1 ; X-RAY DIFFRACTION 2.7Å
e2q41B3[B:38-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE 1 ; X-RAY DIFFRACTION 2.7Å
e1xj5D3[D:38-101] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase 1 ; X-RAY DIFFRACTION 2.66Å
e2q41D3[D:38-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE 1 ; X-RAY DIFFRACTION 2.7Å
e2e5wB2[B:4-57] Image Pymol Jmol Links: PDB, SCOP, CATH
PROBABLE SPERMIDINE SYNTHASE ; ligands: ACT ; X-RAY DIFFRACTION 2.0Å
e3o4fD2[D:4-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: SO4 ; X-RAY DIFFRACTION 2.85Å
e2e5wC2[C:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH
PROBABLE SPERMIDINE SYNTHASE ; ligands: ACT,AG3,MTA ; X-RAY DIFFRACTION 2.0Å
e2e5wD2[D:4-57] Image Pymol Jmol Links: PDB, SCOP, CATH
PROBABLE SPERMIDINE SYNTHASE ; ligands: ACT ; X-RAY DIFFRACTION 2.0Å
e3o4fB2[B:5-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; X-RAY DIFFRACTION 2.85Å
e2zsuC2[C:4-57] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: AG3 ; X-RAY DIFFRACTION 2.2Å
e2zsuD2[D:4-57] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.2Å
e2e5wA2[A:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH
PROBABLE SPERMIDINE SYNTHASE ; ligands: AG3,MTA ; X-RAY DIFFRACTION 2.0Å
e2zsuA2[A:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: AG3 ; X-RAY DIFFRACTION 2.2Å
e3o4fF2[F:5-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: SO4 ; X-RAY DIFFRACTION 2.85Å
e3o4fH2[H:5-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; X-RAY DIFFRACTION 2.85Å
e2zsuF2[F:4-57] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.2Å
e3o4fA2[A:4-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: SO4 ; X-RAY DIFFRACTION 2.85Å
e2zsuB2[B:3-57] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.2Å
e3o4fC2[C:4-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: SO4 ; X-RAY DIFFRACTION 2.85Å
e3o4fG2[G:5-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: SO4 ; X-RAY DIFFRACTION 2.85Å
e3o4fE2[E:5-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: SO4 ; X-RAY DIFFRACTION 2.85Å
e2zsuE2[E:2-57] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: AG3 ; X-RAY DIFFRACTION 2.2Å
e2cmhC3[C:1-55] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.3Å
e2cmgA3[A:1-55] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.0Å
e2cmhB3[B:1-55] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.3Å
e2cmgB3[B:1-55] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.0Å
e2pt9C3[C:41-96] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,2MH,GOL,S4M ; X-RAY DIFFRACTION 2.200Å
e2i7cB3[B:2-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,AAT,GOL ; X-RAY DIFFRACTION 1.71Å
e3b7pB3[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.0Å
e3rw9A3[A:15-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: DSH ; X-RAY DIFFRACTION 2.00Å
e2hteB3[B:3-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,MTA,UNX ; X-RAY DIFFRACTION 2.0Å
e3rw9B3[B:15-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: DSH ; X-RAY DIFFRACTION 2.00Å
e2hteA3[A:3-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,MTA,UNX ; X-RAY DIFFRACTION 2.0Å
e2pwpB3[B:2-58] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: GOL,SPD ; X-RAY DIFFRACTION 2.1Å
e2pt9B3[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,2MH,GOL,S4M ; X-RAY DIFFRACTION 2.200Å
e3bwcA3[A:12-76] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: SAM ; X-RAY DIFFRACTION 2.3Å
e2pssC3[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,GOL ; X-RAY DIFFRACTION 2.2Å
e3b7pA3[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.0Å
e2pssB3[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,GOL ; X-RAY DIFFRACTION 2.2Å
e3bwcB3[B:16-76] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: SAM ; X-RAY DIFFRACTION 2.3Å
e2pssA3[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,GOL ; X-RAY DIFFRACTION 2.2Å
e3bwbB3[B:16-76] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.5Å
e3bwbA3[A:12-76] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.5Å
e3rieC3[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,GOL,JFQ,MTA ; X-RAY DIFFRACTION 1.900Å
e2hteC3[C:3-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,MTA,UNX ; X-RAY DIFFRACTION 2.0Å
e2i7cC3[C:2-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,AAT,GOL ; X-RAY DIFFRACTION 1.71Å
e3b7pC3[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.0Å
e2pt6C3[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,GOL,S4M ; X-RAY DIFFRACTION 2.0Å
e2pwpC3[C:2-58] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: GOL,SPD ; X-RAY DIFFRACTION 2.1Å
e2pt6B3[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,GOL,S4M ; X-RAY DIFFRACTION 2.0Å
e2i7cA3[A:2-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,AAT,GOL ; X-RAY DIFFRACTION 1.71Å
e3rieB3[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,GOL,JFQ,MTA ; X-RAY DIFFRACTION 1.900Å
e2pt6A3[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,GOL,S4M ; X-RAY DIFFRACTION 2.0Å
e2pt9A3[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: 1PG,2MH,GOL,S4M ; X-RAY DIFFRACTION 2.200Å
e3rieA3[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase ; ligands: GOL,JFQ,MTA ; X-RAY DIFFRACTION 1.900Å
e2pwpA3[A:2-58] Image Pymol Jmol Links: PDB, SCOP, CATH
SPERMIDINE SYNTHASE ; ligands: SPD ; X-RAY DIFFRACTION 2.1Å
e4bnoA1[A:2-58] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
; ligands: 4ZY,MTA
e4bnoB1[B:2-58] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
; ligands: 1PG,4ZY,GOL,MTA
e4bnoC1[C:2-58] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
; ligands: 1PG,4ZY,GOL,MTA
e4bp1A1[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: MTA,PUT ; X-RAY DIFFRACTION 2.17Å
e4bp1B1[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,GOL,MTA,PUT ; X-RAY DIFFRACTION 2.17Å
e4bp1C1[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,MTA,PUT ; X-RAY DIFFRACTION 2.17Å
e4bp3A1[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 4MN,S4M ; X-RAY DIFFRACTION 1.76Å
e4bp3B1[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,4MN,GOL,S4M ; X-RAY DIFFRACTION 1.76Å
e4bp3C1[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,4MN,S4M ; X-RAY DIFFRACTION 1.76Å
e2cmhA1[A:1-55] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; X-RAY DIFFRACTION 2.3Å
e4cwaA1[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: JA2 ; X-RAY DIFFRACTION 1.83Å
e4cwaB1[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG ; X-RAY DIFFRACTION 1.83Å
e4cwaC1[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,JA2 ; X-RAY DIFFRACTION 1.83Å
e4cxmA1[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: MTA,SPD ; X-RAY DIFFRACTION 1.75Å
e4cxmB1[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: MTA,SPD ; X-RAY DIFFRACTION 1.75Å
e4cxmC1[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: MTA,SPD ; X-RAY DIFFRACTION 1.75Å
e4uoeA1[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 4ZY,MTA ; X-RAY DIFFRACTION 2.04Å
e4uoeB1[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,4ZY,GOL,MTA ; X-RAY DIFFRACTION 2.04Å
e4uoeC1[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SPERMIDINE SYNTHASE ; ligands: 1PG,4ZY,GOL,MTA ; X-RAY DIFFRACTION 2.04Å
e4yuvA2[A:7-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: S4M ; X-RAY DIFFRACTION 1.60Å
e4yuvB1[B:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: S4M ; X-RAY DIFFRACTION 1.60Å
e4yuwA1[A:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JU,S4M ; X-RAY DIFFRACTION 1.97Å
e4yuwB2[B:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JU,S4M ; X-RAY DIFFRACTION 1.97Å
e4yuxA2[A:2-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JT,S4M ; X-RAY DIFFRACTION 1.60Å
e4yuxB2[B:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JT,S4M ; X-RAY DIFFRACTION 1.60Å
e4yuyA1[A:2-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 1SQ,S4M ; X-RAY DIFFRACTION 1.58Å
e4yuyB1[B:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 1SQ,S4M ; X-RAY DIFFRACTION 1.58Å
e4yuzA1[A:10-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JV,S4M ; X-RAY DIFFRACTION 1.97Å
e4yuzB2[B:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JV,S4M ; X-RAY DIFFRACTION 1.97Å
e4yuzC1[C:7-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JV,S4M ; X-RAY DIFFRACTION 1.97Å
e4yuzD1[D:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JV,S4M ; X-RAY DIFFRACTION 1.97Å
e4yv0A2[A:10-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JW,S4M ; X-RAY DIFFRACTION 1.95Å
e4yv0B2[B:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JW,S4M ; X-RAY DIFFRACTION 1.95Å
e4yv0C2[C:7-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JW,S4M ; X-RAY DIFFRACTION 1.95Å
e4yv0D1[D:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4JW,S4M ; X-RAY DIFFRACTION 1.95Å
e4yv1A1[A:10-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4K2,S4M ; X-RAY DIFFRACTION 1.85Å
e4yv1B1[B:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4K2,S4M ; X-RAY DIFFRACTION 1.85Å
e4yv1C2[C:8-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4K2,S4M ; X-RAY DIFFRACTION 1.85Å
e4yv1D1[D:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4K2,S4M ; X-RAY DIFFRACTION 1.85Å
e4yv2A2[A:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4K3,S4M ; X-RAY DIFFRACTION 2.17Å
e4yv2B1[B:10-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: 4K3,S4M ; X-RAY DIFFRACTION 2.17Å
e5b1sA1[A:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: BSX,S4M ; X-RAY DIFFRACTION 1.58Å
e5b1sB1[B:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: BSX,S4M ; X-RAY DIFFRACTION 1.58Å
e5b1sC2[C:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: BSX,S4M ; X-RAY DIFFRACTION 1.58Å
e5b1sD1[D:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase, putative ; ligands: BSX,S4M ; X-RAY DIFFRACTION 1.58Å
e5x0zA1[A:1-55] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polyamine aminopropyltransferase ; X-RAY DIFFRACTION 2.700Å
e5x0zB1[B:1-55] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polyamine aminopropyltransferase ; X-RAY DIFFRACTION 2.700Å
e5x0zC1[C:1-55] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polyamine aminopropyltransferase ; X-RAY DIFFRACTION 2.700Å
e5x0zD1[D:1-55] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polyamine aminopropyltransferase ; X-RAY DIFFRACTION 2.700Å
e6bq2A2[A:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ACAULIS protein ; X-RAY DIFFRACTION 1.68Å
e6bq2B1[B:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ACAULIS protein ; ligands: EDO,MG ; X-RAY DIFFRACTION 1.68Å
e6bq3A2[A:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ; ligands: DSH ; X-RAY DIFFRACTION 1.91Å
e6bq3B1[B:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ; ligands: DSH ; X-RAY DIFFRACTION 1.91Å
e6bq4A1[A:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ACAULIS protein ; ligands: ADN,B3P,GOL ; X-RAY DIFFRACTION 1.89Å
e6bq4B2[B:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ACAULIS protein ; ligands: ADN,GOL,MES ; X-RAY DIFFRACTION 1.89Å
e6bq5A2[A:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ACAULIS protein ; ligands: B3P,MTA ; X-RAY DIFFRACTION 1.8Å
e6bq5B1[B:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ACAULIS protein ; ligands: B3P,GOL,MTA ; X-RAY DIFFRACTION 1.8Å
e6bq6A1[A:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ; ligands: TER ; X-RAY DIFFRACTION 1.65Å
e6bq6B1[B:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ; ligands: TER ; X-RAY DIFFRACTION 1.65Å
e6bq7A1[A:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ; ligands: SPD ; X-RAY DIFFRACTION 1.95Å
e6bq7B2[B:24-79] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thermospermine synthase ; ligands: SPD ; X-RAY DIFFRACTION 1.95Å
e5y4pB2[B:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase, putative ; ligands: 8QO,S4M ; X-RAY DIFFRACTION 2.17Å
e5y4pA2[A:10-68] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase, putative ; ligands: 8QO,S4M ; X-RAY DIFFRACTION 2.17Å
e5y4pC2[C:10-68] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase, putative ; ligands: 8QO,S4M ; X-RAY DIFFRACTION 2.17Å
e5y4pD1[D:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase, putative ; ligands: 8QO,S4M ; X-RAY DIFFRACTION 2.17Å
e5y4qA2[A:10-68] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase, putative ; ligands: 8OF,S4M ; X-RAY DIFFRACTION 2.07Å
e5y4qB2[B:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase, putative ; ligands: 8OF,S4M ; X-RAY DIFFRACTION 2.07Å
e5y4qC2[C:10-68] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase, putative ; ligands: 8OF,S4M ; X-RAY DIFFRACTION 2.07Å
e5y4qD1[D:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase, putative ; ligands: 8OF,S4M ; X-RAY DIFFRACTION 2.07Å
e6qmmA2[A:2-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polyamine aminopropyltransferase ; ligands: PUT ; X-RAY DIFFRACTION 2.18Å
e6qmmB2[B:6-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polyamine aminopropyltransferase ; ligands: MTA,SPD ; X-RAY DIFFRACTION 2.18Å
e6o64G1[G:40-105] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 2 ; ligands: ACT,PEG ; X-RAY DIFFRACTION 2.0Å
e6o65B1[B:31-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: HAI,S4M,SO4 ; X-RAY DIFFRACTION 1.80Å
e6o63C1[C:42-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: GOL,PEG ; X-RAY DIFFRACTION 1.8Å
e6o63D1[D:41-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: PEG ; X-RAY DIFFRACTION 1.8Å
e6o64C1[C:49-105] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 2 ; ligands: PEG ; X-RAY DIFFRACTION 2.0Å
e6o64D2[D:49-105] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 2 ; ligands: PEG ; X-RAY DIFFRACTION 2.0Å
e6o64E1[E:46-105] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 2 ; ligands: EDO,PEG ; X-RAY DIFFRACTION 2.0Å
e6o64H1[H:44-105] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 2 ; ligands: ACT ; X-RAY DIFFRACTION 2.0Å
e6o63A1[A:37-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: GOL,PEG ; X-RAY DIFFRACTION 1.8Å
e6o63B2[B:40-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: PEG ; X-RAY DIFFRACTION 1.8Å
e6o64A1[A:43-105] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 2 ; ligands: PEG ; X-RAY DIFFRACTION 2.0Å
e6o64B1[B:42-105] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 2 ; ligands: PEG ; X-RAY DIFFRACTION 2.0Å
e6o64F1[F:41-105] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 2 ; ligands: PEG ; X-RAY DIFFRACTION 2.0Å
e6o65A1[A:35-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: HAI,S4M ; X-RAY DIFFRACTION 1.80Å
e6o65C1[C:36-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: HAI,S4M ; X-RAY DIFFRACTION 1.80Å
e6o65D1[D:31-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: HAI,S4M ; X-RAY DIFFRACTION 1.80Å
e6o65E2[E:35-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: HAI,PEG,S4M ; X-RAY DIFFRACTION 1.80Å
e6o65F2[F:31-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: EDO,HAI,S4M ; X-RAY DIFFRACTION 1.80Å
e6o65G2[G:35-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: HAI,S4M ; X-RAY DIFFRACTION 1.80Å
e6o65H1[H:31-101] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Spermidine synthase 1 ; ligands: HAI,S4M ; X-RAY DIFFRACTION 1.80Å
e6hy1A1[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase ; ligands: 1PG,GOL,GXQ,MTA ; X-RAY DIFFRACTION 1.550Å
e6hy1B1[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase ; ligands: 1PG,GOL,GXQ,MTA ; X-RAY DIFFRACTION 1.550Å
e6hy1C2[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase ; ligands: 1PG,GOL,JFQ,MTA ; X-RAY DIFFRACTION 1.550Å
e6i1nA1[A:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase ; ligands: 1PG,JFQ ; X-RAY DIFFRACTION 1.800Å
e6i1nB2[B:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase ; ligands: 1PG,GOL,JFQ ; X-RAY DIFFRACTION 1.800Å
e6i1nC1[C:41-97] Image Pymol Jmol Links: PDB, SCOP, CATH
Spermidine synthase ; ligands: 1PG,GOL,JFQ ; X-RAY DIFFRACTION 1.800Å
e7xifA1[A:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPD ; X-RAY DIFFRACTION 2.14Å
e7xifB2[B:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPD ; X-RAY DIFFRACTION 2.14Å
e7xifC1[C:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPD ; X-RAY DIFFRACTION 2.14Å
e7xifD2[D:2-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPD ; X-RAY DIFFRACTION 2.14Å
e7xifE2[E:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,TER ; X-RAY DIFFRACTION 2.14Å
e7xifF2[F:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,TER ; X-RAY DIFFRACTION 2.14Å
e7xifG1[G:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,TER ; X-RAY DIFFRACTION 2.14Å
e7xifH1[H:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPD ; X-RAY DIFFRACTION 2.14Å
e7xifI1[I:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA ; X-RAY DIFFRACTION 2.14Å
e7xifJ2[J:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA ; X-RAY DIFFRACTION 2.14Å
e7xifK1[K:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA ; X-RAY DIFFRACTION 2.14Å
e7xifL1[L:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA ; X-RAY DIFFRACTION 2.14Å
e7xigA2[A:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.25Å
e7xigB2[B:2-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.25Å
e7xigC2[C:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.25Å
e7xigD1[D:2-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.25Å
e7xigE1[E:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.25Å
e7xigF2[F:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.25Å
e7xigG1[G:4-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.25Å
e7xigH1[H:2-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPM ; X-RAY DIFFRACTION 2.25Å
e7xihA2[A:2-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Polyamine aminopropyltransferase ; ligands: MTA,SPD ; X-RAY DIFFRACTION 1.20Å
Nexte1mjfA2[A:3-55]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH
spermidine synthase ; X-RAY DIFFRACTION 1.8Å
e2o07A2[A:16-74]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
SPERMIDINE SYNTHASE ; ligands: MTA,SPD ; X-RAY DIFFRACTION 1.89Å
beta sandwichestwo beta-sheets stacked together to form a sandwich
beta duplicates or obligate multimersbeta duplicates or monomers associate together to form a compact domain
beta complex topologybeta domains with complex and unique topology that cannot be described as barrel or sandwich or meander
a+b two layersone alpha-helix layer and one beta-sheet layer
a+b three layersone mainly antiparallel beta-sheet layer sandwiched between two alpha-helix layers
a+b four layerstwo beta-sheet layers sandwiched between two alpha-helix layers
a+b complex topologyalpha and beta domain with complex and unique topology that cannot be described in layers
a+b duplicates or obligate multimersalpha and beta duplicates or monomers associated together to form a compact domain
a/b barrelsrepeating beta-alpha units form a barrel
a/b three-layered sandwichesrepeating beta-alpha units form a sandwich with a mainly parallel beta-sheet layer stacked between two alpha-helix layers
mixed a+b and a/balpha and beta domain consists of both a+b and a/b regions
few secondary structure elementsstabilized by cofactors or disulfides
extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes