Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4975
Number of amino acids:402
Molecular Weight:43766.71 Da
Theoretical pI:5.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)307.46%
Cysteine CYS (C)81.99%
Glutamic Acid GLU (E)143.48%
Aspartic Acid ASP (D)174.23%
Glycine GLY (G)225.47%
Phynylalanine PHE (F)194.73%
Isoleucine ILE (I)153.73%
Histidine HIS (H)102.49%
Lysine LYS (K)143.48%
Methionine MET (M)143.48%
Leucine LEU (L)389.45%
Asparagine ASN (N)256.22%
Glutamine GLN (Q)112.74%
Proline PRO (P)266.47%
Serine SER (S)4611.44%
Arginine ARG (R)71.74%
Threonine THR (T)327.96%
Tryptophan TRP (W)41%
Valine VAL (V)327.96%
Tyrosine TYR (Y)184.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1958
HydrogenH3007
NitrogenN497
OxygenO597
SulphurS22

FormulaC1958H3007N497O597S22
Total Number of Atoms:6081


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49320
Absorption 0.1% (=1 g/l)    1.127,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48820
Absorption 0.1% (=1 g/l)    1.115,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.42

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.34, 29.60, 23.88]

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:81.9652
Grand average of hydropathicity (GRAVY):0.03