Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4997
Number of amino acids:625
Molecular Weight:69875.4 Da
Theoretical pI:7.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)447.04%
Cysteine CYS (C)365.76%
Glutamic Acid GLU (E)345.44%
Aspartic Acid ASP (D)396.24%
Glycine GLY (G)518.16%
Phynylalanine PHE (F)203.2%
Isoleucine ILE (I)406.4%
Histidine HIS (H)71.12%
Lysine LYS (K)365.76%
Methionine MET (M)91.44%
Leucine LEU (L)386.08%
Asparagine ASN (N)335.28%
Glutamine GLN (Q)274.32%
Proline PRO (P)254%
Serine SER (S)345.44%
Arginine ARG (R)386.08%
Threonine THR (T)386.08%
Tryptophan TRP (W)152.4%
Valine VAL (V)386.08%
Tyrosine TYR (Y)233.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3055
HydrogenH4768
NitrogenN864
OxygenO927
SulphurS45

FormulaC3055H4768N864O927S45
Total Number of Atoms:9659


Total number of positively charged residues (ARG + LYS):74
Total number of negatively charged residues (ASP + GLU):73
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    119020
Absorption 0.1% (=1 g/l)    1.703,   assuming all pairs of CYS residues form cystines

Ext. coefficient    116770
Absorption 0.1% (=1 g/l)    1.671,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.84, 22.88, 20.00]

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:73.344
Grand average of hydropathicity (GRAVY):-0.37