Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4116
Number of amino acids:486
Molecular Weight:54119.76 Da
Theoretical pI:9.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)5210.7%
Cysteine CYS (C)91.85%
Glutamic Acid GLU (E)173.5%
Aspartic Acid ASP (D)244.94%
Glycine GLY (G)367.41%
Phynylalanine PHE (F)204.12%
Isoleucine ILE (I)255.14%
Histidine HIS (H)153.09%
Lysine LYS (K)326.58%
Methionine MET (M)91.85%
Leucine LEU (L)459.26%
Asparagine ASN (N)285.76%
Glutamine GLN (Q)163.29%
Proline PRO (P)224.53%
Serine SER (S)306.17%
Arginine ARG (R)214.32%
Threonine THR (T)255.14%
Tryptophan TRP (W)91.85%
Valine VAL (V)244.94%
Tyrosine TYR (Y)275.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2443
HydrogenH3750
NitrogenN664
OxygenO695
SulphurS18

FormulaC2443H3750N664O695S18
Total Number of Atoms:7570


Total number of positively charged residues (ARG + LYS):53
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    90230
Absorption 0.1% (=1 g/l)    1.667,   assuming all pairs of CYS residues form cystines

Ext. coefficient    89730
Absorption 0.1% (=1 g/l)    1.658,   assuming all CYS residues are reduced
Aromaticity:0.115

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.97

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.86, 23.87, 25.31]

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:81.1934
Grand average of hydropathicity (GRAVY):-0.26