Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5680
Number of amino acids:320
Molecular Weight:35147.85 Da
Theoretical pI:9.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)206.25%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)185.63%
Aspartic Acid ASP (D)123.75%
Glycine GLY (G)257.81%
Phynylalanine PHE (F)113.44%
Isoleucine ILE (I)319.69%
Histidine HIS (H)20.63%
Lysine LYS (K)237.19%
Methionine MET (M)41.25%
Leucine LEU (L)309.38%
Asparagine ASN (N)175.31%
Glutamine GLN (Q)175.31%
Proline PRO (P)257.81%
Serine SER (S)195.94%
Arginine ARG (R)134.06%
Threonine THR (T)123.75%
Tryptophan TRP (W)10.31%
Valine VAL (V)278.44%
Tyrosine TYR (Y)113.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1595
HydrogenH2569
NitrogenN421
OxygenO457
SulphurS6

FormulaC1595H2569N421O457S6
Total Number of Atoms:5048


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22015
Absorption 0.1% (=1 g/l)    0.626,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21890
Absorption 0.1% (=1 g/l)    0.623,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.13

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.69, 26.88, 22.50]

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:105.062
Grand average of hydropathicity (GRAVY):-0.07