Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5867
Number of amino acids:163
Molecular Weight:17838.37 Da
Theoretical pI:8.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)127.36%
Cysteine CYS (C)21.23%
Glutamic Acid GLU (E)74.29%
Aspartic Acid ASP (D)95.52%
Glycine GLY (G)137.98%
Phynylalanine PHE (F)74.29%
Isoleucine ILE (I)106.13%
Histidine HIS (H)31.84%
Lysine LYS (K)106.13%
Methionine MET (M)21.23%
Leucine LEU (L)169.82%
Asparagine ASN (N)95.52%
Glutamine GLN (Q)31.84%
Proline PRO (P)84.91%
Serine SER (S)127.36%
Arginine ARG (R)84.91%
Threonine THR (T)137.98%
Tryptophan TRP (W)10.61%
Valine VAL (V)127.36%
Tyrosine TYR (Y)63.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC798
HydrogenH1266
NitrogenN216
OxygenO239
SulphurS4

FormulaC798H1266N216O239S4
Total Number of Atoms:2523


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14565
Absorption 0.1% (=1 g/l)    0.816,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.809,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.16

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.90, 25.77, 22.70]

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:90.9202
Grand average of hydropathicity (GRAVY):-0.13