Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4301
Number of amino acids:887
Molecular Weight:99198.65 Da
Theoretical pI:8.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)556.2%
Cysteine CYS (C)202.25%
Glutamic Acid GLU (E)424.74%
Aspartic Acid ASP (D)475.3%
Glycine GLY (G)809.02%
Phynylalanine PHE (F)404.51%
Isoleucine ILE (I)485.41%
Histidine HIS (H)232.59%
Lysine LYS (K)586.54%
Methionine MET (M)171.92%
Leucine LEU (L)667.44%
Asparagine ASN (N)394.4%
Glutamine GLN (Q)293.27%
Proline PRO (P)434.85%
Serine SER (S)768.57%
Arginine ARG (R)374.17%
Threonine THR (T)444.96%
Tryptophan TRP (W)262.93%
Valine VAL (V)576.43%
Tyrosine TYR (Y)404.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4471
HydrogenH6802
NitrogenN1196
OxygenO1294
SulphurS37

FormulaC4471H6802N1196O1294S37
Total Number of Atoms:13800


Total number of positively charged residues (ARG + LYS):95
Total number of negatively charged residues (ASP + GLU):89
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    203850
Absorption 0.1% (=1 g/l)    2.055,   assuming all pairs of CYS residues form cystines

Ext. coefficient    202600
Absorption 0.1% (=1 g/l)    2.042,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.23, 26.83, 20.29]

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:74.9606
Grand average of hydropathicity (GRAVY):-0.32