Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2521
Number of amino acids:49
Molecular Weight:5250.06 Da
Theoretical pI:5.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)816.33%
Glutamic Acid GLU (E)36.12%
Aspartic Acid ASP (D)36.12%
Glycine GLY (G)510.2%
Phynylalanine PHE (F)24.08%
Isoleucine ILE (I)24.08%
Histidine HIS (H)24.08%
Lysine LYS (K)36.12%
Methionine MET (M)12.04%
Leucine LEU (L)36.12%
Asparagine ASN (N)36.12%
Glutamine GLN (Q)00%
Proline PRO (P)24.08%
Serine SER (S)48.16%
Arginine ARG (R)12.04%
Threonine THR (T)24.08%
Tryptophan TRP (W)00%
Valine VAL (V)510.2%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC217
HydrogenH348
NitrogenN62
OxygenO71
SulphurS9

FormulaC217H348N62O71S9
Total Number of Atoms:707


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):6
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    500
Absorption 0.1% (=1 g/l)    0.095,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.041

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 14.64

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.49, 28.57, 14.29]

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:69.3878
Grand average of hydropathicity (GRAVY):0.10