Abstract: A method for producing an ordered protein lattice, the method comprising: (a) providing a first component comprising a subunit of a homooligomeric protein assembly fused to a first subunit of a heterooligomeric protein assembly, and a second component comprising a second subunit of the heterooligomeric protein assembly, wherein the homooligomeric protein assembly and the heterooligomeric protein assembly are each symmetrical in two or three dimensions and share a rotational symmetry axis of the same order; (b) mixing said first monomer and said second monomer to produce a mixture; and (c1) (i) heating the mixture to a temperature about 2° C. to about 10° C. below the visible dissociation temperature; (ii) cooling the mixture by about 10° C. to about 20° C.; and (iii) repeating steps (i) and (ii) at least 10 times; or (c2) (i) heating the mixture to a temperature about 2° C. to about 30° C. or more below the visible dissociation temperature; and (ii) holding the mixture at a temperature about 2° C.

Abstract: Protein layers (1) repeating regularly in two dimensions comprise protein protomers (2) which each comprise at least two monomers (5), (6) genetically fused together. The monomers (5), (6) are monomers of respective oligomer assemblies (3), (4) into which the monomers are assembled to assembly of the protein layer. The first oligomer assembly (3) belongs to a dihedral point group of order O, where O equals (3), (4) or (6) and has a set of O rotational symmetry axes of order (2). The second oligomer assembly (4) has a rotational symmetry axis of order (2). Due to the symmetry of the oligomer assemblies (3), (4), the rotational symmetry axes of each second oligomer assembly (4) is aligned with one of said set of O rotational symmetry axes of a first oligomer assembly (3) with (2) protomers being arranged symmetrically therearound.

Abstract: A method for producing an ordered protein lattice, the method comprising: (a) providing a first component comprising a subunit of a homooligomeric protein assembly fused to a first subunit of a heterooligomeric protein assembly, and a second component comprising a second subunit of the heterooligomeric protein assembly, wherein the homooligomeric protein assembly and the heterooligomeric protein assembly are each symmetrical in two or three dimensions and share a rotational symmetry axis of the same order; (b) mixing said first monomer and said second monomer to produce a mixture; and (c1) (i) heating the mixture to a temperature about 2° C. to about 10° C. below the visible dissociation temperature; (ii) cooling the mixture by about 10° C. to about 20° C.; and (iii) repeating steps (i) and (ii) at least 10 times; or (c2) (i) heating the mixture to a temperature about 2° C. to about 30° C. or more below the visible dissociation temperature; and (ii) holding the mixture at a temperature about 2° C.

Abstract: Protein layers (1) repeating regularly in two dimensions comprise protein protomers (2) which each comprise at least two monomers (5), (6) genetically fused together. The monomers (5), (6) are monomers of respective oligomer assemblies (3), (4) into which the monomers are assembled to assembly of the protein layer. The first oligomer assembly (3) belongs to a dihedral point group of order O, where O equals (3), (4) or (6) and has a set of O rotational symmetry axes of order (2). The second oligomer assembly (4) has a rotational symmetry axis of order (2). Due to the symmetry of the oligomer assemblies (3), (4), the rotational symmetry axes of each second oligomer assembly (4) is aligned with one of said set of O rotational symmetry axes of a first oligomer assembly (3) with (2) protomers being arranged symmetrically therearound.

Abstract: Protein lattices are disclosed which have a regular structure with a repeating unit repeating in three dimensions and have many uses, for example to support an array of macromolecular entities for X-ray crystallography. The repeating unit comprises protein protomers which each comprise at least two monomers fused together. The monomers are each monomers of a respective oligomer assembly into which the monomers are assembled for assembly of the protomers into the lattice. The repeating unit comprises protomers comprising at least a first monomer which is a monomer of a first oligomer assembly which has a set of rotational symmetry axes extending in three dimensions, and a further monomer fused to the first monomer which further monomer is a monomer of a further oligomer assembly which has a rotational symmetry axis of the same order as one of the set of rotational symmetry axes of the first oligomer assembly.

Abstract: Protein layers (1) repeating regularly in two dimensions comprise protein protomers (2) which each comprise at least two monomers (5), (6) genetically fused together. The monomers (5), (6) are monomers of respective oligomer assemblies (3), (4) into which the monomers are assembled to assembly of the protein layer. The first oligomer assembly (3) belongs to a dihedral point group of order O, where O equals (3), (4) or (6) and has a set of O rotational symmetry axes of order (2). The second oligomer assembly (4) has a rotational symmetry axis of order (2). Due to the symmetry of the oligomer assemblies (3), (4), the rotational symmetry axes of each second oligomer assembly (4) is aligned with one of said set of O rotational symmetry axes of a first oligomer assembly (3) with (2) protomers being arranged symmetrically therearound.