1D4N: Human serum transferrin

Human serum transferrin. Determined by X-ray diffraction at 2.0 Å resolution. Released 1 Mar 2000.

Method: X-ray diffraction
Resolution: 2.0 Å
Organism: Homo sapiens
Chains: 1
Atoms: 2,690
Mol. weight: 36.52 kDa
Ligands: CO3, FE
Released: 1 Mar 2000

Explore 1D4N in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

1D4N contains 20 α-helices and 16 β-strands across 1 chain. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 20 helices, 16 β-strands

Element	Residues	Length	Sheet
β-strand	4-11	8	1
α-helix	12-29	18
β-strand	35-42	8	1
α-helix	45-53	9
β-strand	59	1	1
β-strand	60-62	3	2
α-helix	64-71	8
β-strand	78-84	7	2
β-strand	85	1	3
β-strand	92	1	3
β-strand	94-102	9	4
α-helix	109-111	3
β-strand	117-119	3	4
α-helix	125-129	5
α-helix	130-135	6
α-helix	136-138	3
α-helix	140	1
α-helix	142	1
α-helix	146-153	8
β-strand	157-158	2	4
α-helix	168-171	4
α-helix	187-196	10
β-strand	202-206	5	4
α-helix	209-213	5
α-helix	217-220	4
β-strand	223-227	5	4
β-strand	231-233	3	4
α-helix	235-240	6
β-strand	244-247	4	4
α-helix	248-249	2
β-strand	250-253	4	2
α-helix	260-274	15
β-strand	301-304	4	2
α-helix	305-306	2
α-helix	311-315	5
α-helix	317-327	11

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Transferrin	A	protein	329	Homo sapiens	P02787 (AlphaFold model)

Sequence of entity 1 (A), FASTA

>1D4N_1 TRANSFERRIN (chains A)
DKTVRWCAVSEHEATKCQSFRDHMKSVIPSDGPSVACVKKASYLDCIRAIAANEADAVTL
DAGLVYDAYLAPNNLKPVVAEFYGSKEDPQTFYYAVAVVKKDSGFQMNQLRGKKSCHTGL
GRSAGWNIPIGLLYCDLPEPRKPLEKAVANFFSGSCAPCADGTDFPQLCQLCPGCGCSTL
NQYFGYSGAFKCLKDGAGDVAFVKESTIFENLANKADRDQYELLCLDNTRKPVDEYKDCH
LAQVPSHTVVARSMGGKEDLIWELLNQAQEHFGKDKSKEFQLFSSPHGKDLLFKDSAHGF
LKVPPRMDAKMYLGYEYVTAIRNLREGTC

Ligands and cofactors

ID	Name	Formula	Copies
CO3	Carbonate ion	C O3	1
FE	FE (III) ion	Fe	1

Primary citation

Crystal structures of two mutants (K206Q, H207E) of the N-lobe of human transferrin with increased affinity for iron. Yang, A.H., MacGillivray, R.T., Chen, J. et al. Protein Sci (2000) 9:49-52. PubMed

Other PDB entries of the same protein (UniProt P02787 (AlphaFold model), which also has an AlphaFold model), best resolution first:

1RYO 1.2 Å, Human serum transferrin, N-lobe bound with oxalate
1A8E 1.6 Å, Human serum transferrin, recombinant N-terminal lobe
3SKP 1.7 Å, The structure of apo-human transferrin C-lobe with bound sulfate ions
1A8F 1.8 Å, Human serum transferrin, recombinant N-terminal lobe
1D3K 1.8 Å, Human serum transferrin
1FQE 1.8 Å, Crystal structures of mutant (K206A) that abolish the dilysine interaction in the N-lobe…
3FGS 1.8 Å, Crystal structure of G65R/K206E double mutant of the N-lobe human transferrin
1JQF 1.85 Å, Human Transferrin N-Lobe Mutant H249Q
1OQG 1.9 Å, Crystal structure of the D63E mutant of the N-lobe human transferrin
9RTB 1.93 Å, Crystal structure of the adduct formed upon reaction of [V(IV)O(acetylacetonate)2] with…
1N84 2.05 Å, Human serum transferrin, N-lobe
1FQF 2.1 Å, Crystal structures of mutant (K296A) that abolish the dilysine interaction in the N-lobe…

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