Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4950
Number of amino acids:416
Molecular Weight:43489.79 Da
Theoretical pI:4.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)389.13%
Cysteine CYS (C)163.85%
Glutamic Acid GLU (E)81.92%
Aspartic Acid ASP (D)215.05%
Glycine GLY (G)276.49%
Phynylalanine PHE (F)143.37%
Isoleucine ILE (I)307.21%
Histidine HIS (H)30.72%
Lysine LYS (K)102.4%
Methionine MET (M)81.92%
Leucine LEU (L)4310.34%
Asparagine ASN (N)215.05%
Glutamine GLN (Q)102.4%
Proline PRO (P)337.93%
Serine SER (S)5613.46%
Arginine ARG (R)112.64%
Threonine THR (T)266.25%
Tryptophan TRP (W)00%
Valine VAL (V)276.49%
Tyrosine TYR (Y)143.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1920
HydrogenH3056
NitrogenN496
OxygenO602
SulphurS24

FormulaC1920H3056N496O602S24
Total Number of Atoms:6098


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):29
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    21860
Absorption 0.1% (=1 g/l)    0.503,   assuming all pairs of CYS residues form cystines

Ext. coefficient    20860
Absorption 0.1% (=1 g/l)    0.480,   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 : 41.03

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.77, 32.93, 23.32]

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:96.3941
Grand average of hydropathicity (GRAVY):0.29