Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5057
Number of amino acids:436
Molecular Weight:48073.08 Da
Theoretical pI:6.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)317.11%
Cysteine CYS (C)20.46%
Glutamic Acid GLU (E)286.42%
Aspartic Acid ASP (D)245.5%
Glycine GLY (G)296.65%
Phynylalanine PHE (F)173.9%
Isoleucine ILE (I)235.28%
Histidine HIS (H)153.44%
Lysine LYS (K)255.73%
Methionine MET (M)102.29%
Leucine LEU (L)5011.47%
Asparagine ASN (N)153.44%
Glutamine GLN (Q)153.44%
Proline PRO (P)388.72%
Serine SER (S)306.88%
Arginine ARG (R)214.82%
Threonine THR (T)245.5%
Tryptophan TRP (W)00%
Valine VAL (V)276.19%
Tyrosine TYR (Y)122.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2154
HydrogenH3418
NitrogenN584
OxygenO637
SulphurS12

FormulaC2154H3418N584O637S12
Total Number of Atoms:6805


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):52
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18005
Absorption 0.1% (=1 g/l)    0.375,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17880
Absorption 0.1% (=1 g/l)    0.372,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.08

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.59, 25.69, 27.29]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:90.367
Grand average of hydropathicity (GRAVY):-0.28