Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5846
Number of amino acids:221
Molecular Weight:24485.42 Da
Theoretical pI:8.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)73.17%
Cysteine CYS (C)94.07%
Glutamic Acid GLU (E)52.26%
Aspartic Acid ASP (D)104.52%
Glycine GLY (G)177.69%
Phynylalanine PHE (F)156.79%
Isoleucine ILE (I)135.88%
Histidine HIS (H)20.9%
Lysine LYS (K)125.43%
Methionine MET (M)31.36%
Leucine LEU (L)2611.76%
Asparagine ASN (N)177.69%
Glutamine GLN (Q)62.71%
Proline PRO (P)167.24%
Serine SER (S)188.14%
Arginine ARG (R)94.07%
Threonine THR (T)114.98%
Tryptophan TRP (W)20.9%
Valine VAL (V)167.24%
Tyrosine TYR (Y)73.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1110
HydrogenH1731
NitrogenN289
OxygenO311
SulphurS12

FormulaC1110H1731N289O311S12
Total Number of Atoms:3453


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21930
Absorption 0.1% (=1 g/l)    0.896,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21430
Absorption 0.1% (=1 g/l)    0.875,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.46

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.75, 30.77, 18.55]

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:92.9864
Grand average of hydropathicity (GRAVY):0.07